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Finding the Fourth Proportional to 131,250, 181,134.72 and 74,679.60

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Solution

The fourth proportional to 131,250, 181,134.72 and 74,679.60 is: 103,063.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,250 : 181,134.72 = 74,679.60 : x
  2. Step 2: Convert to fraction form
    131,250/181,134.72 = 74,679.60/x
  3. Step 3: Cross multiply
    131,250x = 181,134.72 × 74,679.60
  4. Step 4: Simplify right side
    131,250x = 13,527,068,435.71
  5. Step 5: Solve for x
    x = 13,527,068,435.71/131,250
  6. Step 6: Final answer
    x = 103,063.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.