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Finding the Fourth Proportional to 115,213.98, 158,917.49 and 100,080.28

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Solution

The fourth proportional to 115,213.98, 158,917.49 and 100,080.28 is: 138,043.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,213.98 : 158,917.49 = 100,080.28 : x
  2. Step 2: Convert to fraction form
    115,213.98/158,917.49 = 100,080.28/x
  3. Step 3: Cross multiply
    115,213.98x = 158,917.49 × 100,080.28
  4. Step 4: Simplify right side
    115,213.98x = 15,904,506,896.10
  5. Step 5: Solve for x
    x = 15,904,506,896.10/115,213.98
  6. Step 6: Final answer
    x = 138,043.20

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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.