Home / 428,767.39-642,942.70-129,192.13

Finding the Fourth Proportional to 428,767.39, 642,942.70 and 129,192.13

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Solution

The fourth proportional to 428,767.39, 642,942.70 and 129,192.13 is: 193,725.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,767.39 : 642,942.70 = 129,192.13 : x
  2. Step 2: Convert to fraction form
    428,767.39/642,942.70 = 129,192.13/x
  3. Step 3: Cross multiply
    428,767.39x = 642,942.70 × 129,192.13
  4. Step 4: Simplify right side
    428,767.39x = 83,063,134,950.61
  5. Step 5: Solve for x
    x = 83,063,134,950.61/428,767.39
  6. Step 6: Final answer
    x = 193,725.40

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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.