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Finding the Fourth Proportional to 71,019.80, 98,007.64 and 39,189.64

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Solution

The fourth proportional to 71,019.80, 98,007.64 and 39,189.64 is: 54,081.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,019.80 : 98,007.64 = 39,189.64 : x
  2. Step 2: Convert to fraction form
    71,019.80/98,007.64 = 39,189.64/x
  3. Step 3: Cross multiply
    71,019.80x = 98,007.64 × 39,189.64
  4. Step 4: Simplify right side
    71,019.80x = 3,840,884,128.85
  5. Step 5: Solve for x
    x = 3,840,884,128.85/71,019.80
  6. Step 6: Final answer
    x = 54,081.88

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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.