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Finding the Fourth Proportional to 121,575.30, 181,925.55 and 82,209.30

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Solution

The fourth proportional to 121,575.30, 181,925.55 and 82,209.30 is: 123,018.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,575.30 : 181,925.55 = 82,209.30 : x
  2. Step 2: Convert to fraction form
    121,575.30/181,925.55 = 82,209.30/x
  3. Step 3: Cross multiply
    121,575.30x = 181,925.55 × 82,209.30
  4. Step 4: Simplify right side
    121,575.30x = 14,955,972,117.62
  5. Step 5: Solve for x
    x = 14,955,972,117.62/121,575.30
  6. Step 6: Final answer
    x = 123,018.18

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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.