Home / 81,306.95-121,956.67-21,333.94

Finding the Fourth Proportional to 81,306.95, 121,956.67 and 21,333.94

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Solution

The fourth proportional to 81,306.95, 121,956.67 and 21,333.94 is: 31,999.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,306.95 : 121,956.67 = 21,333.94 : x
  2. Step 2: Convert to fraction form
    81,306.95/121,956.67 = 21,333.94/x
  3. Step 3: Cross multiply
    81,306.95x = 121,956.67 × 21,333.94
  4. Step 4: Simplify right side
    81,306.95x = 2,601,816,568.16
  5. Step 5: Solve for x
    x = 2,601,816,568.16/81,306.95
  6. Step 6: Final answer
    x = 31,999.93

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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.