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Finding the Fourth Proportional to 230,820.28, 318,532.84 and 128,843.91

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Solution

The fourth proportional to 230,820.28, 318,532.84 and 128,843.91 is: 177,805.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,820.28 : 318,532.84 = 128,843.91 : x
  2. Step 2: Convert to fraction form
    230,820.28/318,532.84 = 128,843.91/x
  3. Step 3: Cross multiply
    230,820.28x = 318,532.84 × 128,843.91
  4. Step 4: Simplify right side
    230,820.28x = 41,041,015,924.78
  5. Step 5: Solve for x
    x = 41,041,015,924.78/230,820.28
  6. Step 6: Final answer
    x = 177,805.07

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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.