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Finding the Fourth Proportional to 121,610.82, 182,693.04 and 87,980.58

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Solution

The fourth proportional to 121,610.82, 182,693.04 and 87,980.58 is: 132,171.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,610.82 : 182,693.04 = 87,980.58 : x
  2. Step 2: Convert to fraction form
    121,610.82/182,693.04 = 87,980.58/x
  3. Step 3: Cross multiply
    121,610.82x = 182,693.04 × 87,980.58
  4. Step 4: Simplify right side
    121,610.82x = 16,073,439,621.16
  5. Step 5: Solve for x
    x = 16,073,439,621.16/121,610.82
  6. Step 6: Final answer
    x = 132,171.13

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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.