Home / 100,062.28-138,072.42-57,047.32

Finding the Fourth Proportional to 100,062.28, 138,072.42 and 57,047.32

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Solution

The fourth proportional to 100,062.28, 138,072.42 and 57,047.32 is: 78,717.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,062.28 : 138,072.42 = 57,047.32 : x
  2. Step 2: Convert to fraction form
    100,062.28/138,072.42 = 57,047.32/x
  3. Step 3: Cross multiply
    100,062.28x = 138,072.42 × 57,047.32
  4. Step 4: Simplify right side
    100,062.28x = 7,876,661,526.91
  5. Step 5: Solve for x
    x = 7,876,661,526.91/100,062.28
  6. Step 6: Final answer
    x = 78,717.59

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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.