Home / 137,572.38-189,857.79-77,162.40

Finding the Fourth Proportional to 137,572.38, 189,857.79 and 77,162.40

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Solution

The fourth proportional to 137,572.38, 189,857.79 and 77,162.40 is: 106,488.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,572.38 : 189,857.79 = 77,162.40 : x
  2. Step 2: Convert to fraction form
    137,572.38/189,857.79 = 77,162.40/x
  3. Step 3: Cross multiply
    137,572.38x = 189,857.79 × 77,162.40
  4. Step 4: Simplify right side
    137,572.38x = 14,649,882,735.10
  5. Step 5: Solve for x
    x = 14,649,882,735.10/137,572.38
  6. Step 6: Final answer
    x = 106,488.55

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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.