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Finding the Fourth Proportional to 123,249.66, 170,085.48 and 72,263.70

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Solution

The fourth proportional to 123,249.66, 170,085.48 and 72,263.70 is: 99,724.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,249.66 : 170,085.48 = 72,263.70 : x
  2. Step 2: Convert to fraction form
    123,249.66/170,085.48 = 72,263.70/x
  3. Step 3: Cross multiply
    123,249.66x = 170,085.48 × 72,263.70
  4. Step 4: Simplify right side
    123,249.66x = 12,291,006,101.08
  5. Step 5: Solve for x
    x = 12,291,006,101.08/123,249.66
  6. Step 6: Final answer
    x = 99,724.46

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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.