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Finding the Fourth Proportional to 90,617.68, 125,026.50 and 54,781.66

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Solution

The fourth proportional to 90,617.68, 125,026.50 and 54,781.66 is: 75,583.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,617.68 : 125,026.50 = 54,781.66 : x
  2. Step 2: Convert to fraction form
    90,617.68/125,026.50 = 54,781.66/x
  3. Step 3: Cross multiply
    90,617.68x = 125,026.50 × 54,781.66
  4. Step 4: Simplify right side
    90,617.68x = 6,849,159,213.99
  5. Step 5: Solve for x
    x = 6,849,159,213.99/90,617.68
  6. Step 6: Final answer
    x = 75,583.03

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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.