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Finding the Fourth Proportional to 90,374.67, 124,646.86 and 61,717.38

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Solution

The fourth proportional to 90,374.67, 124,646.86 and 61,717.38 is: 85,122.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,374.67 : 124,646.86 = 61,717.38 : x
  2. Step 2: Convert to fraction form
    90,374.67/124,646.86 = 61,717.38/x
  3. Step 3: Cross multiply
    90,374.67x = 124,646.86 × 61,717.38
  4. Step 4: Simplify right side
    90,374.67x = 7,692,877,624.43
  5. Step 5: Solve for x
    x = 7,692,877,624.43/90,374.67
  6. Step 6: Final answer
    x = 85,122.05

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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.