Home / 87,389.28-130,879.80-80,332.56

Finding the Fourth Proportional to 87,389.28, 130,879.80 and 80,332.56

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Solution

The fourth proportional to 87,389.28, 130,879.80 and 80,332.56 is: 120,311.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,389.28 : 130,879.80 = 80,332.56 : x
  2. Step 2: Convert to fraction form
    87,389.28/130,879.80 = 80,332.56/x
  3. Step 3: Cross multiply
    87,389.28x = 130,879.80 × 80,332.56
  4. Step 4: Simplify right side
    87,389.28x = 10,513,909,386.29
  5. Step 5: Solve for x
    x = 10,513,909,386.29/87,389.28
  6. Step 6: Final answer
    x = 120,311.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.