Home / 80,719.95-121,078.70-36,315.34

Finding the Fourth Proportional to 80,719.95, 121,078.70 and 36,315.34

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Solution

The fourth proportional to 80,719.95, 121,078.70 and 36,315.34 is: 54,472.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,719.95 : 121,078.70 = 36,315.34 : x
  2. Step 2: Convert to fraction form
    80,719.95/121,078.70 = 36,315.34/x
  3. Step 3: Cross multiply
    80,719.95x = 121,078.70 × 36,315.34
  4. Step 4: Simplify right side
    80,719.95x = 4,397,014,248.05
  5. Step 5: Solve for x
    x = 4,397,014,248.05/80,719.95
  6. Step 6: Final answer
    x = 54,472.46

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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.