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Finding the Fourth Proportional to 93,607.20, 140,119.20 and 90,691.20

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Solution

The fourth proportional to 93,607.20, 140,119.20 and 90,691.20 is: 135,754.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,607.20 : 140,119.20 = 90,691.20 : x
  2. Step 2: Convert to fraction form
    93,607.20/140,119.20 = 90,691.20/x
  3. Step 3: Cross multiply
    93,607.20x = 140,119.20 × 90,691.20
  4. Step 4: Simplify right side
    93,607.20x = 12,707,578,391.04
  5. Step 5: Solve for x
    x = 12,707,578,391.04/93,607.20
  6. Step 6: Final answer
    x = 135,754.28

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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.