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Finding the Fourth Proportional to 71,001.82, 97,980.91 and 39,170.71

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Solution

The fourth proportional to 71,001.82, 97,980.91 and 39,170.71 is: 54,054.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,001.82 : 97,980.91 = 39,170.71 : x
  2. Step 2: Convert to fraction form
    71,001.82/97,980.91 = 39,170.71/x
  3. Step 3: Cross multiply
    71,001.82x = 97,980.91 × 39,170.71
  4. Step 4: Simplify right side
    71,001.82x = 3,837,981,811.15
  5. Step 5: Solve for x
    x = 3,837,981,811.15/71,001.82
  6. Step 6: Final answer
    x = 54,054.70

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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.