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Finding the Fourth Proportional to 235,600.50, 325,128.70 and 129,616.50

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Solution

The fourth proportional to 235,600.50, 325,128.70 and 129,616.50 is: 178,870.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,600.50 : 325,128.70 = 129,616.50 : x
  2. Step 2: Convert to fraction form
    235,600.50/325,128.70 = 129,616.50/x
  3. Step 3: Cross multiply
    235,600.50x = 325,128.70 × 129,616.50
  4. Step 4: Simplify right side
    235,600.50x = 42,142,044,143.55
  5. Step 5: Solve for x
    x = 42,142,044,143.55/235,600.50
  6. Step 6: Final answer
    x = 178,870.78

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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.