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Finding the Fourth Proportional to 80,430.56, 120,678.95 and 27,876.95

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Solution

The fourth proportional to 80,430.56, 120,678.95 and 27,876.95 is: 41,826.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,430.56 : 120,678.95 = 27,876.95 : x
  2. Step 2: Convert to fraction form
    80,430.56/120,678.95 = 27,876.95/x
  3. Step 3: Cross multiply
    80,430.56x = 120,678.95 × 27,876.95
  4. Step 4: Simplify right side
    80,430.56x = 3,364,161,055.20
  5. Step 5: Solve for x
    x = 3,364,161,055.20/80,430.56
  6. Step 6: Final answer
    x = 41,826.90

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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.