Home / 71,801.12-99,087.29-39,972.17

Finding the Fourth Proportional to 71,801.12, 99,087.29 and 39,972.17

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Solution

The fourth proportional to 71,801.12, 99,087.29 and 39,972.17 is: 55,162.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,801.12 : 99,087.29 = 39,972.17 : x
  2. Step 2: Convert to fraction form
    71,801.12/99,087.29 = 39,972.17/x
  3. Step 3: Cross multiply
    71,801.12x = 99,087.29 × 39,972.17
  4. Step 4: Simplify right side
    71,801.12x = 3,960,733,305.42
  5. Step 5: Solve for x
    x = 3,960,733,305.42/71,801.12
  6. Step 6: Final answer
    x = 55,162.56

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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.