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Finding the Fourth Proportional to 90,531, 124,932.78 and 50,787

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Solution

The fourth proportional to 90,531, 124,932.78 and 50,787 is: 70,086.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,531 : 124,932.78 = 50,787 : x
  2. Step 2: Convert to fraction form
    90,531/124,932.78 = 50,787/x
  3. Step 3: Cross multiply
    90,531x = 124,932.78 × 50,787
  4. Step 4: Simplify right side
    90,531x = 6,344,961,097.86
  5. Step 5: Solve for x
    x = 6,344,961,097.86/90,531
  6. Step 6: Final answer
    x = 70,086.06

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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.