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Finding the Fourth Proportional to 423,641.53, 635,549.78 and 124,131.88

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Solution

The fourth proportional to 423,641.53, 635,549.78 and 124,131.88 is: 186,223.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,641.53 : 635,549.78 = 124,131.88 : x
  2. Step 2: Convert to fraction form
    423,641.53/635,549.78 = 124,131.88/x
  3. Step 3: Cross multiply
    423,641.53x = 635,549.78 × 124,131.88
  4. Step 4: Simplify right side
    423,641.53x = 78,891,989,024.99
  5. Step 5: Solve for x
    x = 78,891,989,024.99/423,641.53
  6. Step 6: Final answer
    x = 186,223.45

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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.