Home / 123,498.50-170,428.09-66,909.87

Finding the Fourth Proportional to 123,498.50, 170,428.09 and 66,909.87

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Solution

The fourth proportional to 123,498.50, 170,428.09 and 66,909.87 is: 92,335.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,498.50 : 170,428.09 = 66,909.87 : x
  2. Step 2: Convert to fraction form
    123,498.50/170,428.09 = 66,909.87/x
  3. Step 3: Cross multiply
    123,498.50x = 170,428.09 × 66,909.87
  4. Step 4: Simplify right side
    123,498.50x = 11,403,321,346.25
  5. Step 5: Solve for x
    x = 11,403,321,346.25/123,498.50
  6. Step 6: Final answer
    x = 92,335.71

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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.