Home / 100,658.09-138,909.87-55,337.96

Finding the Fourth Proportional to 100,658.09, 138,909.87 and 55,337.96

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Solution

The fourth proportional to 100,658.09, 138,909.87 and 55,337.96 is: 76,367.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,658.09 : 138,909.87 = 55,337.96 : x
  2. Step 2: Convert to fraction form
    100,658.09/138,909.87 = 55,337.96/x
  3. Step 3: Cross multiply
    100,658.09x = 138,909.87 × 55,337.96
  4. Step 4: Simplify right side
    100,658.09x = 7,686,988,135.12
  5. Step 5: Solve for x
    x = 7,686,988,135.12/100,658.09
  6. Step 6: Final answer
    x = 76,367.32

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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.