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Finding the Fourth Proportional to 71,001.54, 97,981.86 and 39,170.28

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Solution

The fourth proportional to 71,001.54, 97,981.86 and 39,170.28 is: 54,054.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,001.54 : 97,981.86 = 39,170.28 : x
  2. Step 2: Convert to fraction form
    71,001.54/97,981.86 = 39,170.28/x
  3. Step 3: Cross multiply
    71,001.54x = 97,981.86 × 39,170.28
  4. Step 4: Simplify right side
    71,001.54x = 3,837,976,891.12
  5. Step 5: Solve for x
    x = 3,837,976,891.12/71,001.54
  6. Step 6: Final answer
    x = 54,054.84

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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.