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Finding the Fourth Proportional to 71,008.89, 97,992.80 and 39,178.95

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Solution

The fourth proportional to 71,008.89, 97,992.80 and 39,178.95 is: 54,067.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,008.89 : 97,992.80 = 39,178.95 : x
  2. Step 2: Convert to fraction form
    71,008.89/97,992.80 = 39,178.95/x
  3. Step 3: Cross multiply
    71,008.89x = 97,992.80 × 39,178.95
  4. Step 4: Simplify right side
    71,008.89x = 3,839,255,011.56
  5. Step 5: Solve for x
    x = 3,839,255,011.56/71,008.89
  6. Step 6: Final answer
    x = 54,067.24

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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.