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Finding the Fourth Proportional to 100,422.24, 138,525.12 and 62,630.88

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Solution

The fourth proportional to 100,422.24, 138,525.12 and 62,630.88 is: 86,394.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,422.24 : 138,525.12 = 62,630.88 : x
  2. Step 2: Convert to fraction form
    100,422.24/138,525.12 = 62,630.88/x
  3. Step 3: Cross multiply
    100,422.24x = 138,525.12 × 62,630.88
  4. Step 4: Simplify right side
    100,422.24x = 8,675,950,167.71
  5. Step 5: Solve for x
    x = 8,675,950,167.71/100,422.24
  6. Step 6: Final answer
    x = 86,394.71

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1.5x scale

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.