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Finding the Fourth Proportional to 84,390.40, 126,474.86 and 62,099.40

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Solution

The fourth proportional to 84,390.40, 126,474.86 and 62,099.40 is: 93,067.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,390.40 : 126,474.86 = 62,099.40 : x
  2. Step 2: Convert to fraction form
    84,390.40/126,474.86 = 62,099.40/x
  3. Step 3: Cross multiply
    84,390.40x = 126,474.86 × 62,099.40
  4. Step 4: Simplify right side
    84,390.40x = 7,854,012,921.08
  5. Step 5: Solve for x
    x = 7,854,012,921.08/84,390.40
  6. Step 6: Final answer
    x = 93,067.61

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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.