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Finding the Fourth Proportional to 71,885.17, 99,202.17 and 39,620.95

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Solution

The fourth proportional to 71,885.17, 99,202.17 and 39,620.95 is: 54,677.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,885.17 : 99,202.17 = 39,620.95 : x
  2. Step 2: Convert to fraction form
    71,885.17/99,202.17 = 39,620.95/x
  3. Step 3: Cross multiply
    71,885.17x = 99,202.17 × 39,620.95
  4. Step 4: Simplify right side
    71,885.17x = 3,930,483,895.17
  5. Step 5: Solve for x
    x = 3,930,483,895.17/71,885.17
  6. Step 6: Final answer
    x = 54,677.26

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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.