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Finding the Fourth Proportional to 87,034.50, 130,349.30 and 84,640.05

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Solution

The fourth proportional to 87,034.50, 130,349.30 and 84,640.05 is: 126,763.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,034.50 : 130,349.30 = 84,640.05 : x
  2. Step 2: Convert to fraction form
    87,034.50/130,349.30 = 84,640.05/x
  3. Step 3: Cross multiply
    87,034.50x = 130,349.30 × 84,640.05
  4. Step 4: Simplify right side
    87,034.50x = 11,032,770,846.26
  5. Step 5: Solve for x
    x = 11,032,770,846.26/87,034.50
  6. Step 6: Final answer
    x = 126,763.19

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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.