Home / 100,175.04-138,425.76-71,835.84

Finding the Fourth Proportional to 100,175.04, 138,425.76 and 71,835.84

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Solution

The fourth proportional to 100,175.04, 138,425.76 and 71,835.84 is: 99,265.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,175.04 : 138,425.76 = 71,835.84 : x
  2. Step 2: Convert to fraction form
    100,175.04/138,425.76 = 71,835.84/x
  3. Step 3: Cross multiply
    100,175.04x = 138,425.76 × 71,835.84
  4. Step 4: Simplify right side
    100,175.04x = 9,943,930,747.24
  5. Step 5: Solve for x
    x = 9,943,930,747.24/100,175.04
  6. Step 6: Final answer
    x = 99,265.55

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1.5x scale

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.