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Finding the Fourth Proportional to 235,565.10, 325,082.43 and 128,135.43

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Solution

The fourth proportional to 235,565.10, 325,082.43 and 128,135.43 is: 176,828.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,565.10 : 325,082.43 = 128,135.43 : x
  2. Step 2: Convert to fraction form
    235,565.10/325,082.43 = 128,135.43/x
  3. Step 3: Cross multiply
    235,565.10x = 325,082.43 × 128,135.43
  4. Step 4: Simplify right side
    235,565.10x = 41,654,576,953.49
  5. Step 5: Solve for x
    x = 41,654,576,953.49/235,565.10
  6. Step 6: Final answer
    x = 176,828.30

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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.