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Finding the Fourth Proportional to 187,020.80, 280,531.20 and 117,036.80

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Solution

The fourth proportional to 187,020.80, 280,531.20 and 117,036.80 is: 175,555.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,020.80 : 280,531.20 = 117,036.80 : x
  2. Step 2: Convert to fraction form
    187,020.80/280,531.20 = 117,036.80/x
  3. Step 3: Cross multiply
    187,020.80x = 280,531.20 × 117,036.80
  4. Step 4: Simplify right side
    187,020.80x = 32,832,473,948.16
  5. Step 5: Solve for x
    x = 32,832,473,948.16/187,020.80
  6. Step 6: Final answer
    x = 175,555.20

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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.