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Finding the Fourth Proportional to 187,424.74, 258,687.66 and 129,363

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Solution

The fourth proportional to 187,424.74, 258,687.66 and 129,363 is: 178,549.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,424.74 : 258,687.66 = 129,363 : x
  2. Step 2: Convert to fraction form
    187,424.74/258,687.66 = 129,363/x
  3. Step 3: Cross multiply
    187,424.74x = 258,687.66 × 129,363
  4. Step 4: Simplify right side
    187,424.74x = 33,464,611,760.58
  5. Step 5: Solve for x
    x = 33,464,611,760.58/187,424.74
  6. Step 6: Final answer
    x = 178,549.60

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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.