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Finding the Fourth Proportional to 144,487.20, 216,731.12 and 39,306.40

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Solution

The fourth proportional to 144,487.20, 216,731.12 and 39,306.40 is: 58,959.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,487.20 : 216,731.12 = 39,306.40 : x
  2. Step 2: Convert to fraction form
    144,487.20/216,731.12 = 39,306.40/x
  3. Step 3: Cross multiply
    144,487.20x = 216,731.12 × 39,306.40
  4. Step 4: Simplify right side
    144,487.20x = 8,518,920,095.17
  5. Step 5: Solve for x
    x = 8,518,920,095.17/144,487.20
  6. Step 6: Final answer
    x = 58,959.69

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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.