Home / 77,678.40-107,122.24-50,812.48

Finding the Fourth Proportional to 77,678.40, 107,122.24 and 50,812.48

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Solution

The fourth proportional to 77,678.40, 107,122.24 and 50,812.48 is: 70,072.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,678.40 : 107,122.24 = 50,812.48 : x
  2. Step 2: Convert to fraction form
    77,678.40/107,122.24 = 50,812.48/x
  3. Step 3: Cross multiply
    77,678.40x = 107,122.24 × 50,812.48
  4. Step 4: Simplify right side
    77,678.40x = 5,443,146,677.56
  5. Step 5: Solve for x
    x = 5,443,146,677.56/77,678.40
  6. Step 6: Final answer
    x = 70,072.85

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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.