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Finding the Fourth Proportional to 280,930.33, 421,332.72 and 81,206.20

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Solution

The fourth proportional to 280,930.33, 421,332.72 and 81,206.20 is: 121,791.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,930.33 : 421,332.72 = 81,206.20 : x
  2. Step 2: Convert to fraction form
    280,930.33/421,332.72 = 81,206.20/x
  3. Step 3: Cross multiply
    280,930.33x = 421,332.72 × 81,206.20
  4. Step 4: Simplify right side
    280,930.33x = 34,214,829,126.86
  5. Step 5: Solve for x
    x = 34,214,829,126.86/280,930.33
  6. Step 6: Final answer
    x = 121,791.15

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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.