Home / 81,261.28-121,872.78-45,737.71

Finding the Fourth Proportional to 81,261.28, 121,872.78 and 45,737.71

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Solution

The fourth proportional to 81,261.28, 121,872.78 and 45,737.71 is: 68,595.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,261.28 : 121,872.78 = 45,737.71 : x
  2. Step 2: Convert to fraction form
    81,261.28/121,872.78 = 45,737.71/x
  3. Step 3: Cross multiply
    81,261.28x = 121,872.78 × 45,737.71
  4. Step 4: Simplify right side
    81,261.28x = 5,574,181,868.53
  5. Step 5: Solve for x
    x = 5,574,181,868.53/81,261.28
  6. Step 6: Final answer
    x = 68,595.79

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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.