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Finding the Fourth Proportional to 80,101.12, 120,169.90 and 42,641.45

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Solution

The fourth proportional to 80,101.12, 120,169.90 and 42,641.45 is: 63,971.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,101.12 : 120,169.90 = 42,641.45 : x
  2. Step 2: Convert to fraction form
    80,101.12/120,169.90 = 42,641.45/x
  3. Step 3: Cross multiply
    80,101.12x = 120,169.90 × 42,641.45
  4. Step 4: Simplify right side
    80,101.12x = 5,124,218,782.36
  5. Step 5: Solve for x
    x = 5,124,218,782.36/80,101.12
  6. Step 6: Final answer
    x = 63,971.87

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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.