Home / 99,642.16-137,478.36-57,185.20

Finding the Fourth Proportional to 99,642.16, 137,478.36 and 57,185.20

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Solution

The fourth proportional to 99,642.16, 137,478.36 and 57,185.20 is: 78,899.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,642.16 : 137,478.36 = 57,185.20 : x
  2. Step 2: Convert to fraction form
    99,642.16/137,478.36 = 57,185.20/x
  3. Step 3: Cross multiply
    99,642.16x = 137,478.36 × 57,185.20
  4. Step 4: Simplify right side
    99,642.16x = 7,861,727,512.27
  5. Step 5: Solve for x
    x = 7,861,727,512.27/99,642.16
  6. Step 6: Final answer
    x = 78,899.61

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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.