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Finding the Fourth Proportional to 129,295.78, 178,424.73 and 71,932.20

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Solution

The fourth proportional to 129,295.78, 178,424.73 and 71,932.20 is: 99,264.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,295.78 : 178,424.73 = 71,932.20 : x
  2. Step 2: Convert to fraction form
    129,295.78/178,424.73 = 71,932.20/x
  3. Step 3: Cross multiply
    129,295.78x = 178,424.73 × 71,932.20
  4. Step 4: Simplify right side
    129,295.78x = 12,834,483,363.31
  5. Step 5: Solve for x
    x = 12,834,483,363.31/129,295.78
  6. Step 6: Final answer
    x = 99,264.52

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1.5x scale

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.