Home / 99,979.20-137,985.39-61,240.14

Finding the Fourth Proportional to 99,979.20, 137,985.39 and 61,240.14

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Solution

The fourth proportional to 99,979.20, 137,985.39 and 61,240.14 is: 84,520.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,979.20 : 137,985.39 = 61,240.14 : x
  2. Step 2: Convert to fraction form
    99,979.20/137,985.39 = 61,240.14/x
  3. Step 3: Cross multiply
    99,979.20x = 137,985.39 × 61,240.14
  4. Step 4: Simplify right side
    99,979.20x = 8,450,244,601.55
  5. Step 5: Solve for x
    x = 8,450,244,601.55/99,979.20
  6. Step 6: Final answer
    x = 84,520.03

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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.