Home / 81,572.42-122,364.46-34,139.78

Finding the Fourth Proportional to 81,572.42, 122,364.46 and 34,139.78

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Solution

The fourth proportional to 81,572.42, 122,364.46 and 34,139.78 is: 51,212.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,572.42 : 122,364.46 = 34,139.78 : x
  2. Step 2: Convert to fraction form
    81,572.42/122,364.46 = 34,139.78/x
  3. Step 3: Cross multiply
    81,572.42x = 122,364.46 × 34,139.78
  4. Step 4: Simplify right side
    81,572.42x = 4,177,495,441.90
  5. Step 5: Solve for x
    x = 4,177,495,441.90/81,572.42
  6. Step 6: Final answer
    x = 51,212.11

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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.