Home / 87,086.43-130,644.23-78,270.39

Finding the Fourth Proportional to 87,086.43, 130,644.23 and 78,270.39

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Solution

The fourth proportional to 87,086.43, 130,644.23 and 78,270.39 is: 117,418.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,086.43 : 130,644.23 = 78,270.39 : x
  2. Step 2: Convert to fraction form
    87,086.43/130,644.23 = 78,270.39/x
  3. Step 3: Cross multiply
    87,086.43x = 130,644.23 × 78,270.39
  4. Step 4: Simplify right side
    87,086.43x = 10,225,574,442.00
  5. Step 5: Solve for x
    x = 10,225,574,442.00/87,086.43
  6. Step 6: Final answer
    x = 117,418.69

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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.