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Finding the Fourth Proportional to 230,881.42, 318,613.25 and 128,908.44

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Solution

The fourth proportional to 230,881.42, 318,613.25 and 128,908.44 is: 177,891.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,881.42 : 318,613.25 = 128,908.44 : x
  2. Step 2: Convert to fraction form
    230,881.42/318,613.25 = 128,908.44/x
  3. Step 3: Cross multiply
    230,881.42x = 318,613.25 × 128,908.44
  4. Step 4: Simplify right side
    230,881.42x = 41,071,937,020.83
  5. Step 5: Solve for x
    x = 41,071,937,020.83/230,881.42
  6. Step 6: Final answer
    x = 177,891.91

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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.