Home / 115,280.76-159,081.90-64,979.64

Finding the Fourth Proportional to 115,280.76, 159,081.90 and 64,979.64

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Solution

The fourth proportional to 115,280.76, 159,081.90 and 64,979.64 is: 89,668.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,280.76 : 159,081.90 = 64,979.64 : x
  2. Step 2: Convert to fraction form
    115,280.76/159,081.90 = 64,979.64/x
  3. Step 3: Cross multiply
    115,280.76x = 159,081.90 × 64,979.64
  4. Step 4: Simplify right side
    115,280.76x = 10,337,084,592.52
  5. Step 5: Solve for x
    x = 10,337,084,592.52/115,280.76
  6. Step 6: Final answer
    x = 89,668.78

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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.