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Finding the Fourth Proportional to 142,495.80, 213,635.70 and 72,425.40

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Solution

The fourth proportional to 142,495.80, 213,635.70 and 72,425.40 is: 108,583.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,495.80 : 213,635.70 = 72,425.40 : x
  2. Step 2: Convert to fraction form
    142,495.80/213,635.70 = 72,425.40/x
  3. Step 3: Cross multiply
    142,495.80x = 213,635.70 × 72,425.40
  4. Step 4: Simplify right side
    142,495.80x = 15,472,651,026.78
  5. Step 5: Solve for x
    x = 15,472,651,026.78/142,495.80
  6. Step 6: Final answer
    x = 108,583.21

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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.