Home / 100,167.53-138,325-64,419.80

Finding the Fourth Proportional to 100,167.53, 138,325 and 64,419.80

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Solution

The fourth proportional to 100,167.53, 138,325 and 64,419.80 is: 88,959.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,167.53 : 138,325 = 64,419.80 : x
  2. Step 2: Convert to fraction form
    100,167.53/138,325 = 64,419.80/x
  3. Step 3: Cross multiply
    100,167.53x = 138,325 × 64,419.80
  4. Step 4: Simplify right side
    100,167.53x = 8,910,868,835
  5. Step 5: Solve for x
    x = 8,910,868,835/100,167.53
  6. Step 6: Final answer
    x = 88,959.65

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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.