Home / 80,769.12-111,423.12-56,908.96

Finding the Fourth Proportional to 80,769.12, 111,423.12 and 56,908.96

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Solution

The fourth proportional to 80,769.12, 111,423.12 and 56,908.96 is: 78,507.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,769.12 : 111,423.12 = 56,908.96 : x
  2. Step 2: Convert to fraction form
    80,769.12/111,423.12 = 56,908.96/x
  3. Step 3: Cross multiply
    80,769.12x = 111,423.12 × 56,908.96
  4. Step 4: Simplify right side
    80,769.12x = 6,340,973,879.16
  5. Step 5: Solve for x
    x = 6,340,973,879.16/80,769.12
  6. Step 6: Final answer
    x = 78,507.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.