Home / 80,747.19-121,119.71-28,156.50

Finding the Fourth Proportional to 80,747.19, 121,119.71 and 28,156.50

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Solution

The fourth proportional to 80,747.19, 121,119.71 and 28,156.50 is: 42,234.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,747.19 : 121,119.71 = 28,156.50 : x
  2. Step 2: Convert to fraction form
    80,747.19/121,119.71 = 28,156.50/x
  3. Step 3: Cross multiply
    80,747.19x = 121,119.71 × 28,156.50
  4. Step 4: Simplify right side
    80,747.19x = 3,410,306,973.83
  5. Step 5: Solve for x
    x = 3,410,306,973.83/80,747.19
  6. Step 6: Final answer
    x = 42,234.37

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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.