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Finding the Fourth Proportional to 93,417.20, 140,125.80 and 86,200.10

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Solution

The fourth proportional to 93,417.20, 140,125.80 and 86,200.10 is: 129,300.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,417.20 : 140,125.80 = 86,200.10 : x
  2. Step 2: Convert to fraction form
    93,417.20/140,125.80 = 86,200.10/x
  3. Step 3: Cross multiply
    93,417.20x = 140,125.80 × 86,200.10
  4. Step 4: Simplify right side
    93,417.20x = 12,078,857,972.58
  5. Step 5: Solve for x
    x = 12,078,857,972.58/93,417.20
  6. Step 6: Final answer
    x = 129,300.15

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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.