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Finding the Fourth Proportional to 71,000.99, 97,981.35 and 39,169.89

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Solution

The fourth proportional to 71,000.99, 97,981.35 and 39,169.89 is: 54,054.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,000.99 : 97,981.35 = 39,169.89 : x
  2. Step 2: Convert to fraction form
    71,000.99/97,981.35 = 39,169.89/x
  3. Step 3: Cross multiply
    71,000.99x = 97,981.35 × 39,169.89
  4. Step 4: Simplify right side
    71,000.99x = 3,837,918,701.55
  5. Step 5: Solve for x
    x = 3,837,918,701.55/71,000.99
  6. Step 6: Final answer
    x = 54,054.44

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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.