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Finding the Fourth Proportional to 71,425.47, 107,129.57 and 18,838.92

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Solution

The fourth proportional to 71,425.47, 107,129.57 and 18,838.92 is: 28,256.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,425.47 : 107,129.57 = 18,838.92 : x
  2. Step 2: Convert to fraction form
    71,425.47/107,129.57 = 18,838.92/x
  3. Step 3: Cross multiply
    71,425.47x = 107,129.57 × 18,838.92
  4. Step 4: Simplify right side
    71,425.47x = 2,018,205,304.67
  5. Step 5: Solve for x
    x = 2,018,205,304.67/71,425.47
  6. Step 6: Final answer
    x = 28,256.10

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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.