Home / 136,020.74-187,654.86-78,649.52

Finding the Fourth Proportional to 136,020.74, 187,654.86 and 78,649.52

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Solution

The fourth proportional to 136,020.74, 187,654.86 and 78,649.52 is: 108,505.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,020.74 : 187,654.86 = 78,649.52 : x
  2. Step 2: Convert to fraction form
    136,020.74/187,654.86 = 78,649.52/x
  3. Step 3: Cross multiply
    136,020.74x = 187,654.86 × 78,649.52
  4. Step 4: Simplify right side
    136,020.74x = 14,758,963,726.39
  5. Step 5: Solve for x
    x = 14,758,963,726.39/136,020.74
  6. Step 6: Final answer
    x = 108,505.25

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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.