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Finding the Fourth Proportional to 128,981.80, 193,338.30 and 62,321.32

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Solution

The fourth proportional to 128,981.80, 193,338.30 and 62,321.32 is: 93,417.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,981.80 : 193,338.30 = 62,321.32 : x
  2. Step 2: Convert to fraction form
    128,981.80/193,338.30 = 62,321.32/x
  3. Step 3: Cross multiply
    128,981.80x = 193,338.30 × 62,321.32
  4. Step 4: Simplify right side
    128,981.80x = 12,049,098,062.56
  5. Step 5: Solve for x
    x = 12,049,098,062.56/128,981.80
  6. Step 6: Final answer
    x = 93,417.04

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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.