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Finding the Fourth Proportional to 187,425.74, 258,689.04 and 129,364

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Solution

The fourth proportional to 187,425.74, 258,689.04 and 129,364 is: 178,550.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,425.74 : 258,689.04 = 129,364 : x
  2. Step 2: Convert to fraction form
    187,425.74/258,689.04 = 129,364/x
  3. Step 3: Cross multiply
    187,425.74x = 258,689.04 × 129,364
  4. Step 4: Simplify right side
    187,425.74x = 33,465,048,970.56
  5. Step 5: Solve for x
    x = 33,465,048,970.56/187,425.74
  6. Step 6: Final answer
    x = 178,550.98

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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.