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Finding the Fourth Proportional to 124,980.57, 187,470.86 and 31,493.61

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Solution

The fourth proportional to 124,980.57, 187,470.86 and 31,493.61 is: 47,240.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,980.57 : 187,470.86 = 31,493.61 : x
  2. Step 2: Convert to fraction form
    124,980.57/187,470.86 = 31,493.61/x
  3. Step 3: Cross multiply
    124,980.57x = 187,470.86 × 31,493.61
  4. Step 4: Simplify right side
    124,980.57x = 5,904,133,993.74
  5. Step 5: Solve for x
    x = 5,904,133,993.74/124,980.57
  6. Step 6: Final answer
    x = 47,240.42

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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.