Home / 140,787.68-194,289.48-77,121.32

Finding the Fourth Proportional to 140,787.68, 194,289.48 and 77,121.32

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Solution

The fourth proportional to 140,787.68, 194,289.48 and 77,121.32 is: 106,428.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,787.68 : 194,289.48 = 77,121.32 : x
  2. Step 2: Convert to fraction form
    140,787.68/194,289.48 = 77,121.32/x
  3. Step 3: Cross multiply
    140,787.68x = 194,289.48 × 77,121.32
  4. Step 4: Simplify right side
    140,787.68x = 14,983,861,159.71
  5. Step 5: Solve for x
    x = 14,983,861,159.71/140,787.68
  6. Step 6: Final answer
    x = 106,428.78

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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.