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Finding the Fourth Proportional to 144,778.60, 217,751.10 and 129,615.40

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Solution

The fourth proportional to 144,778.60, 217,751.10 and 129,615.40 is: 194,945.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,778.60 : 217,751.10 = 129,615.40 : x
  2. Step 2: Convert to fraction form
    144,778.60/217,751.10 = 129,615.40/x
  3. Step 3: Cross multiply
    144,778.60x = 217,751.10 × 129,615.40
  4. Step 4: Simplify right side
    144,778.60x = 28,223,895,926.94
  5. Step 5: Solve for x
    x = 28,223,895,926.94/144,778.60
  6. Step 6: Final answer
    x = 194,945.22

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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.