Home / 99,965.28-137,942.56-54,640.40

Finding the Fourth Proportional to 99,965.28, 137,942.56 and 54,640.40

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Solution

The fourth proportional to 99,965.28, 137,942.56 and 54,640.40 is: 75,398.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,965.28 : 137,942.56 = 54,640.40 : x
  2. Step 2: Convert to fraction form
    99,965.28/137,942.56 = 54,640.40/x
  3. Step 3: Cross multiply
    99,965.28x = 137,942.56 × 54,640.40
  4. Step 4: Simplify right side
    99,965.28x = 7,537,236,655.42
  5. Step 5: Solve for x
    x = 7,537,236,655.42/99,965.28
  6. Step 6: Final answer
    x = 75,398.54

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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.