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Finding the Fourth Proportional to 80,456,728.90, 120,685,093.35 and 19,872,454.90

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Solution

The fourth proportional to 80,456,728.90, 120,685,093.35 and 19,872,454.90 is: 29,808,682.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,456,728.90 : 120,685,093.35 = 19,872,454.90 : x
  2. Step 2: Convert to fraction form
    80,456,728.90/120,685,093.35 = 19,872,454.90/x
  3. Step 3: Cross multiply
    80,456,728.90x = 120,685,093.35 × 19,872,454.90
  4. Step 4: Simplify right side
    80,456,728.90x = 2,398,309,074,700,164.50
  5. Step 5: Solve for x
    x = 2,398,309,074,700,164.50/80,456,728.90
  6. Step 6: Final answer
    x = 29,808,682.35

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.