Home / 100,338.03-138,470.48-55,017.64

Finding the Fourth Proportional to 100,338.03, 138,470.48 and 55,017.64

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Solution

The fourth proportional to 100,338.03, 138,470.48 and 55,017.64 is: 75,926.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,338.03 : 138,470.48 = 55,017.64 : x
  2. Step 2: Convert to fraction form
    100,338.03/138,470.48 = 55,017.64/x
  3. Step 3: Cross multiply
    100,338.03x = 138,470.48 × 55,017.64
  4. Step 4: Simplify right side
    100,338.03x = 7,618,318,711.15
  5. Step 5: Solve for x
    x = 7,618,318,711.15/100,338.03
  6. Step 6: Final answer
    x = 75,926.53

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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.