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Finding the Fourth Proportional to 90,568.76, 124,978.64 and 50,279.40

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Solution

The fourth proportional to 90,568.76, 124,978.64 and 50,279.40 is: 69,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,568.76 : 124,978.64 = 50,279.40 : x
  2. Step 2: Convert to fraction form
    90,568.76/124,978.64 = 50,279.40/x
  3. Step 3: Cross multiply
    90,568.76x = 124,978.64 × 50,279.40
  4. Step 4: Simplify right side
    90,568.76x = 6,283,850,780.62
  5. Step 5: Solve for x
    x = 6,283,850,780.62/90,568.76
  6. Step 6: Final answer
    x = 69,382.10

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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.