Home / 67,981.98-101,972.98-21,238.50

Finding the Fourth Proportional to 67,981.98, 101,972.98 and 21,238.50

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Solution

The fourth proportional to 67,981.98, 101,972.98 and 21,238.50 is: 31,857.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,981.98 : 101,972.98 = 21,238.50 : x
  2. Step 2: Convert to fraction form
    67,981.98/101,972.98 = 21,238.50/x
  3. Step 3: Cross multiply
    67,981.98x = 101,972.98 × 21,238.50
  4. Step 4: Simplify right side
    67,981.98x = 2,165,753,135.73
  5. Step 5: Solve for x
    x = 2,165,753,135.73/67,981.98
  6. Step 6: Final answer
    x = 31,857.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.