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Finding the Fourth Proportional to 230,620.28, 318,243.84 and 128,656.40

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Solution

The fourth proportional to 230,620.28, 318,243.84 and 128,656.40 is: 177,539.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,620.28 : 318,243.84 = 128,656.40 : x
  2. Step 2: Convert to fraction form
    230,620.28/318,243.84 = 128,656.40/x
  3. Step 3: Cross multiply
    230,620.28x = 318,243.84 × 128,656.40
  4. Step 4: Simplify right side
    230,620.28x = 40,944,106,776.58
  5. Step 5: Solve for x
    x = 40,944,106,776.58/230,620.28
  6. Step 6: Final answer
    x = 177,539.06

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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.