Home / 81,618.55-122,701.20-70,792.90

Finding the Fourth Proportional to 81,618.55, 122,701.20 and 70,792.90

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Solution

The fourth proportional to 81,618.55, 122,701.20 and 70,792.90 is: 106,426.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,618.55 : 122,701.20 = 70,792.90 : x
  2. Step 2: Convert to fraction form
    81,618.55/122,701.20 = 70,792.90/x
  3. Step 3: Cross multiply
    81,618.55x = 122,701.20 × 70,792.90
  4. Step 4: Simplify right side
    81,618.55x = 8,686,373,781.48
  5. Step 5: Solve for x
    x = 8,686,373,781.48/81,618.55
  6. Step 6: Final answer
    x = 106,426.47

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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.