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Finding the Fourth Proportional to 121,079.79, 181,617.87 and 54,472.89

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Solution

The fourth proportional to 121,079.79, 181,617.87 and 54,472.89 is: 81,708.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,079.79 : 181,617.87 = 54,472.89 : x
  2. Step 2: Convert to fraction form
    121,079.79/181,617.87 = 54,472.89/x
  3. Step 3: Cross multiply
    121,079.79x = 181,617.87 × 54,472.89
  4. Step 4: Simplify right side
    121,079.79x = 9,893,249,074.09
  5. Step 5: Solve for x
    x = 9,893,249,074.09/121,079.79
  6. Step 6: Final answer
    x = 81,708.51

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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.