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Finding the Fourth Proportional to 163,687.80, 245,531.70 and 156,689.40

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Solution

The fourth proportional to 163,687.80, 245,531.70 and 156,689.40 is: 235,034.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,687.80 : 245,531.70 = 156,689.40 : x
  2. Step 2: Convert to fraction form
    163,687.80/245,531.70 = 156,689.40/x
  3. Step 3: Cross multiply
    163,687.80x = 245,531.70 × 156,689.40
  4. Step 4: Simplify right side
    163,687.80x = 38,472,214,753.98
  5. Step 5: Solve for x
    x = 38,472,214,753.98/163,687.80
  6. Step 6: Final answer
    x = 235,034.10

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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.