Home / 138,965.65-208,460.78-39,126.70

Finding the Fourth Proportional to 138,965.65, 208,460.78 and 39,126.70

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Solution

The fourth proportional to 138,965.65, 208,460.78 and 39,126.70 is: 58,693.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,965.65 : 208,460.78 = 39,126.70 : x
  2. Step 2: Convert to fraction form
    138,965.65/208,460.78 = 39,126.70/x
  3. Step 3: Cross multiply
    138,965.65x = 208,460.78 × 39,126.70
  4. Step 4: Simplify right side
    138,965.65x = 8,156,382,400.83
  5. Step 5: Solve for x
    x = 8,156,382,400.83/138,965.65
  6. Step 6: Final answer
    x = 58,693.51

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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.