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Finding the Fourth Proportional to 230,946.71, 318,700.24 and 128,969.33

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Solution

The fourth proportional to 230,946.71, 318,700.24 and 128,969.33 is: 177,974.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,946.71 : 318,700.24 = 128,969.33 : x
  2. Step 2: Convert to fraction form
    230,946.71/318,700.24 = 128,969.33/x
  3. Step 3: Cross multiply
    230,946.71x = 318,700.24 × 128,969.33
  4. Step 4: Simplify right side
    230,946.71x = 41,102,554,507.71
  5. Step 5: Solve for x
    x = 41,102,554,507.71/230,946.71
  6. Step 6: Final answer
    x = 177,974.20

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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.