Home / 100,103.34-138,198.28-69,521.80

Finding the Fourth Proportional to 100,103.34, 138,198.28 and 69,521.80

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Solution

The fourth proportional to 100,103.34, 138,198.28 and 69,521.80 is: 95,978.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,103.34 : 138,198.28 = 69,521.80 : x
  2. Step 2: Convert to fraction form
    100,103.34/138,198.28 = 69,521.80/x
  3. Step 3: Cross multiply
    100,103.34x = 138,198.28 × 69,521.80
  4. Step 4: Simplify right side
    100,103.34x = 9,607,793,182.50
  5. Step 5: Solve for x
    x = 9,607,793,182.50/100,103.34
  6. Step 6: Final answer
    x = 95,978.75

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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.