Home / 138,601.43-191,269.04-78,172.59

Finding the Fourth Proportional to 138,601.43, 191,269.04 and 78,172.59

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Solution

The fourth proportional to 138,601.43, 191,269.04 and 78,172.59 is: 107,877.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,601.43 : 191,269.04 = 78,172.59 : x
  2. Step 2: Convert to fraction form
    138,601.43/191,269.04 = 78,172.59/x
  3. Step 3: Cross multiply
    138,601.43x = 191,269.04 × 78,172.59
  4. Step 4: Simplify right side
    138,601.43x = 14,951,996,243.61
  5. Step 5: Solve for x
    x = 14,951,996,243.61/138,601.43
  6. Step 6: Final answer
    x = 107,877.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.