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Finding the Fourth Proportional to 67,658.79, 101,456.19 and 20,255.58

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Solution

The fourth proportional to 67,658.79, 101,456.19 and 20,255.58 is: 30,373.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,658.79 : 101,456.19 = 20,255.58 : x
  2. Step 2: Convert to fraction form
    67,658.79/101,456.19 = 20,255.58/x
  3. Step 3: Cross multiply
    67,658.79x = 101,456.19 × 20,255.58
  4. Step 4: Simplify right side
    67,658.79x = 2,055,053,973.04
  5. Step 5: Solve for x
    x = 2,055,053,973.04/67,658.79
  6. Step 6: Final answer
    x = 30,373.79

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1.5x scale

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.