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Finding the Fourth Proportional to 138,376.40, 207,487.80 and 55,176.40

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Solution

The fourth proportional to 138,376.40, 207,487.80 and 55,176.40 is: 82,733.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,376.40 : 207,487.80 = 55,176.40 : x
  2. Step 2: Convert to fraction form
    138,376.40/207,487.80 = 55,176.40/x
  3. Step 3: Cross multiply
    138,376.40x = 207,487.80 × 55,176.40
  4. Step 4: Simplify right side
    138,376.40x = 11,448,429,847.92
  5. Step 5: Solve for x
    x = 11,448,429,847.92/138,376.40
  6. Step 6: Final answer
    x = 82,733.98

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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.