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Finding the Fourth Proportional to 75,109.49, 112,661.30 and 18,948.90

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Solution

The fourth proportional to 75,109.49, 112,661.30 and 18,948.90 is: 28,422.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,109.49 : 112,661.30 = 18,948.90 : x
  2. Step 2: Convert to fraction form
    75,109.49/112,661.30 = 18,948.90/x
  3. Step 3: Cross multiply
    75,109.49x = 112,661.30 × 18,948.90
  4. Step 4: Simplify right side
    75,109.49x = 2,134,808,070.83
  5. Step 5: Solve for x
    x = 2,134,808,070.83/75,109.49
  6. Step 6: Final answer
    x = 28,422.61

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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.