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Finding the Fourth Proportional to 70,691.71, 106,113.10 and 28,599.30

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Solution

The fourth proportional to 70,691.71, 106,113.10 and 28,599.30 is: 42,929.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,691.71 : 106,113.10 = 28,599.30 : x
  2. Step 2: Convert to fraction form
    70,691.71/106,113.10 = 28,599.30/x
  3. Step 3: Cross multiply
    70,691.71x = 106,113.10 × 28,599.30
  4. Step 4: Simplify right side
    70,691.71x = 3,034,760,701.62
  5. Step 5: Solve for x
    x = 3,034,760,701.62/70,691.71
  6. Step 6: Final answer
    x = 42,929.51

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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.