Home / 100,531.92-138,745.14-57,515.40

Finding the Fourth Proportional to 100,531.92, 138,745.14 and 57,515.40

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Solution

The fourth proportional to 100,531.92, 138,745.14 and 57,515.40 is: 79,377.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,531.92 : 138,745.14 = 57,515.40 : x
  2. Step 2: Convert to fraction form
    100,531.92/138,745.14 = 57,515.40/x
  3. Step 3: Cross multiply
    100,531.92x = 138,745.14 × 57,515.40
  4. Step 4: Simplify right side
    100,531.92x = 7,979,982,225.16
  5. Step 5: Solve for x
    x = 7,979,982,225.16/100,531.92
  6. Step 6: Final answer
    x = 79,377.60

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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.