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Finding the Fourth Proportional to 230,634.63, 318,243.96 and 128,648.16

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Solution

The fourth proportional to 230,634.63, 318,243.96 and 128,648.16 is: 177,516.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,634.63 : 318,243.96 = 128,648.16 : x
  2. Step 2: Convert to fraction form
    230,634.63/318,243.96 = 128,648.16/x
  3. Step 3: Cross multiply
    230,634.63x = 318,243.96 × 128,648.16
  4. Step 4: Simplify right side
    230,634.63x = 40,941,499,885.11
  5. Step 5: Solve for x
    x = 40,941,499,885.11/230,634.63
  6. Step 6: Final answer
    x = 177,516.71

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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.