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Finding the Fourth Proportional to 138,083.56, 207,123.20 and 62,128.44

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Solution

The fourth proportional to 138,083.56, 207,123.20 and 62,128.44 is: 93,191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,083.56 : 207,123.20 = 62,128.44 : x
  2. Step 2: Convert to fraction form
    138,083.56/207,123.20 = 62,128.44/x
  3. Step 3: Cross multiply
    138,083.56x = 207,123.20 × 62,128.44
  4. Step 4: Simplify right side
    138,083.56x = 12,868,241,303.81
  5. Step 5: Solve for x
    x = 12,868,241,303.81/138,083.56
  6. Step 6: Final answer
    x = 93,191.70

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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.