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Finding the Fourth Proportional to 424,418.81, 636,729.36 and 124,909.16

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Solution

The fourth proportional to 424,418.81, 636,729.36 and 124,909.16 is: 187,393.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,418.81 : 636,729.36 = 124,909.16 : x
  2. Step 2: Convert to fraction form
    424,418.81/636,729.36 = 124,909.16/x
  3. Step 3: Cross multiply
    424,418.81x = 636,729.36 × 124,909.16
  4. Step 4: Simplify right side
    424,418.81x = 79,533,325,696.75
  5. Step 5: Solve for x
    x = 79,533,325,696.75/424,418.81
  6. Step 6: Final answer
    x = 187,393.50

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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.