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Finding the Fourth Proportional to 500,839.17, 751,247.80 and 121,761.90

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Solution

The fourth proportional to 500,839.17, 751,247.80 and 121,761.90 is: 182,640.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,839.17 : 751,247.80 = 121,761.90 : x
  2. Step 2: Convert to fraction form
    500,839.17/751,247.80 = 121,761.90/x
  3. Step 3: Cross multiply
    500,839.17x = 751,247.80 × 121,761.90
  4. Step 4: Simplify right side
    500,839.17x = 91,473,359,498.82
  5. Step 5: Solve for x
    x = 91,473,359,498.82/500,839.17
  6. Step 6: Final answer
    x = 182,640.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.