Home / 100,270.08-138,305.76-64,505.28

Finding the Fourth Proportional to 100,270.08, 138,305.76 and 64,505.28

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Solution

The fourth proportional to 100,270.08, 138,305.76 and 64,505.28 is: 88,974.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,270.08 : 138,305.76 = 64,505.28 : x
  2. Step 2: Convert to fraction form
    100,270.08/138,305.76 = 64,505.28/x
  3. Step 3: Cross multiply
    100,270.08x = 138,305.76 × 64,505.28
  4. Step 4: Simplify right side
    100,270.08x = 8,921,451,774.41
  5. Step 5: Solve for x
    x = 8,921,451,774.41/100,270.08
  6. Step 6: Final answer
    x = 88,974.22

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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.