Home / 99,979.20-137,971.80-54,656.52

Finding the Fourth Proportional to 99,979.20, 137,971.80 and 54,656.52

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Solution

The fourth proportional to 99,979.20, 137,971.80 and 54,656.52 is: 75,426.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,979.20 : 137,971.80 = 54,656.52 : x
  2. Step 2: Convert to fraction form
    99,979.20/137,971.80 = 54,656.52/x
  3. Step 3: Cross multiply
    99,979.20x = 137,971.80 × 54,656.52
  4. Step 4: Simplify right side
    99,979.20x = 7,541,058,446.14
  5. Step 5: Solve for x
    x = 7,541,058,446.14/99,979.20
  6. Step 6: Final answer
    x = 75,426.27

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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.