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Finding the Fourth Proportional to 99,538.88, 137,363.65 and 54,826.88

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Solution

The fourth proportional to 99,538.88, 137,363.65 and 54,826.88 is: 75,661.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,538.88 : 137,363.65 = 54,826.88 : x
  2. Step 2: Convert to fraction form
    99,538.88/137,363.65 = 54,826.88/x
  3. Step 3: Cross multiply
    99,538.88x = 137,363.65 × 54,826.88
  4. Step 4: Simplify right side
    99,538.88x = 7,531,219,531.03
  5. Step 5: Solve for x
    x = 7,531,219,531.03/99,538.88
  6. Step 6: Final answer
    x = 75,661.09

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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.