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Finding the Fourth Proportional to 98,869.80, 148,326.60 and 54,473.72

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Solution

The fourth proportional to 98,869.80, 148,326.60 and 54,473.72 is: 81,722.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,869.80 : 148,326.60 = 54,473.72 : x
  2. Step 2: Convert to fraction form
    98,869.80/148,326.60 = 54,473.72/x
  3. Step 3: Cross multiply
    98,869.80x = 148,326.60 × 54,473.72
  4. Step 4: Simplify right side
    98,869.80x = 8,079,901,676.95
  5. Step 5: Solve for x
    x = 8,079,901,676.95/98,869.80
  6. Step 6: Final answer
    x = 81,722.65

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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.