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Finding the Fourth Proportional to 128,872.40, 193,357.20 and 62,371.40

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Solution

The fourth proportional to 128,872.40, 193,357.20 and 62,371.40 is: 93,580.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,872.40 : 193,357.20 = 62,371.40 : x
  2. Step 2: Convert to fraction form
    128,872.40/193,357.20 = 62,371.40/x
  3. Step 3: Cross multiply
    128,872.40x = 193,357.20 × 62,371.40
  4. Step 4: Simplify right side
    128,872.40x = 12,059,959,264.08
  5. Step 5: Solve for x
    x = 12,059,959,264.08/128,872.40
  6. Step 6: Final answer
    x = 93,580.62

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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.