Home / 115,680.21-159,641.94-64,694.85

Finding the Fourth Proportional to 115,680.21, 159,641.94 and 64,694.85

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Solution

The fourth proportional to 115,680.21, 159,641.94 and 64,694.85 is: 89,280.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,680.21 : 159,641.94 = 64,694.85 : x
  2. Step 2: Convert to fraction form
    115,680.21/159,641.94 = 64,694.85/x
  3. Step 3: Cross multiply
    115,680.21x = 159,641.94 × 64,694.85
  4. Step 4: Simplify right side
    115,680.21x = 10,328,011,362.01
  5. Step 5: Solve for x
    x = 10,328,011,362.01/115,680.21
  6. Step 6: Final answer
    x = 89,280.71

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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.