Home / 99,045.28-136,735.44-77,489.20

Finding the Fourth Proportional to 99,045.28, 136,735.44 and 77,489.20

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Solution

The fourth proportional to 99,045.28, 136,735.44 and 77,489.20 is: 106,976.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,045.28 : 136,735.44 = 77,489.20 : x
  2. Step 2: Convert to fraction form
    99,045.28/136,735.44 = 77,489.20/x
  3. Step 3: Cross multiply
    99,045.28x = 136,735.44 × 77,489.20
  4. Step 4: Simplify right side
    99,045.28x = 10,595,519,857.25
  5. Step 5: Solve for x
    x = 10,595,519,857.25/99,045.28
  6. Step 6: Final answer
    x = 106,976.52

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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.