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Finding the Fourth Proportional to 138,342.60, 207,611.10 and 59,513.40

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Solution

The fourth proportional to 138,342.60, 207,611.10 and 59,513.40 is: 89,311.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,342.60 : 207,611.10 = 59,513.40 : x
  2. Step 2: Convert to fraction form
    138,342.60/207,611.10 = 59,513.40/x
  3. Step 3: Cross multiply
    138,342.60x = 207,611.10 × 59,513.40
  4. Step 4: Simplify right side
    138,342.60x = 12,355,642,438.74
  5. Step 5: Solve for x
    x = 12,355,642,438.74/138,342.60
  6. Step 6: Final answer
    x = 89,311.91

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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.