Home / 115,769.80-159,770.90-64,787.64

Finding the Fourth Proportional to 115,769.80, 159,770.90 and 64,787.64

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Solution

The fourth proportional to 115,769.80, 159,770.90 and 64,787.64 is: 89,411.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,769.80 : 159,770.90 = 64,787.64 : x
  2. Step 2: Convert to fraction form
    115,769.80/159,770.90 = 64,787.64/x
  3. Step 3: Cross multiply
    115,769.80x = 159,770.90 × 64,787.64
  4. Step 4: Simplify right side
    115,769.80x = 10,351,179,713.65
  5. Step 5: Solve for x
    x = 10,351,179,713.65/115,769.80
  6. Step 6: Final answer
    x = 89,411.75

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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.