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Finding the Fourth Proportional to 424,498.14, 636,747.21 and 124,978.77

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Solution

The fourth proportional to 424,498.14, 636,747.21 and 124,978.77 is: 187,468.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,498.14 : 636,747.21 = 124,978.77 : x
  2. Step 2: Convert to fraction form
    424,498.14/636,747.21 = 124,978.77/x
  3. Step 3: Cross multiply
    424,498.14x = 636,747.21 × 124,978.77
  4. Step 4: Simplify right side
    424,498.14x = 79,579,885,424.84
  5. Step 5: Solve for x
    x = 79,579,885,424.84/424,498.14
  6. Step 6: Final answer
    x = 187,468.16

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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.