Home / 77,678.90-107,082.78-54,947.87

Finding the Fourth Proportional to 77,678.90, 107,082.78 and 54,947.87

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Solution

The fourth proportional to 77,678.90, 107,082.78 and 54,947.87 is: 75,747.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,678.90 : 107,082.78 = 54,947.87 : x
  2. Step 2: Convert to fraction form
    77,678.90/107,082.78 = 54,947.87/x
  3. Step 3: Cross multiply
    77,678.90x = 107,082.78 × 54,947.87
  4. Step 4: Simplify right side
    77,678.90x = 5,883,970,674.68
  5. Step 5: Solve for x
    x = 5,883,970,674.68/77,678.90
  6. Step 6: Final answer
    x = 75,747.35

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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.