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Finding the Fourth Proportional to 138,186.60, 207,280.44 and 38,354.64

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Solution

The fourth proportional to 138,186.60, 207,280.44 and 38,354.64 is: 57,532.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,186.60 : 207,280.44 = 38,354.64 : x
  2. Step 2: Convert to fraction form
    138,186.60/207,280.44 = 38,354.64/x
  3. Step 3: Cross multiply
    138,186.60x = 207,280.44 × 38,354.64
  4. Step 4: Simplify right side
    138,186.60x = 7,950,166,655.24
  5. Step 5: Solve for x
    x = 7,950,166,655.24/138,186.60
  6. Step 6: Final answer
    x = 57,532.11

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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.