Home / 81,981.12-122,972.40-22,821.60

Finding the Fourth Proportional to 81,981.12, 122,972.40 and 22,821.60

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Solution

The fourth proportional to 81,981.12, 122,972.40 and 22,821.60 is: 34,232.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,981.12 : 122,972.40 = 22,821.60 : x
  2. Step 2: Convert to fraction form
    81,981.12/122,972.40 = 22,821.60/x
  3. Step 3: Cross multiply
    81,981.12x = 122,972.40 × 22,821.60
  4. Step 4: Simplify right side
    81,981.12x = 2,806,426,923.84
  5. Step 5: Solve for x
    x = 2,806,426,923.84/81,981.12
  6. Step 6: Final answer
    x = 34,232.60

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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.