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Finding the Fourth Proportional to 235,665.40, 353,288.56 and 85,877.52

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Solution

The fourth proportional to 235,665.40, 353,288.56 and 85,877.52 is: 128,739.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,665.40 : 353,288.56 = 85,877.52 : x
  2. Step 2: Convert to fraction form
    235,665.40/353,288.56 = 85,877.52/x
  3. Step 3: Cross multiply
    235,665.40x = 353,288.56 × 85,877.52
  4. Step 4: Simplify right side
    235,665.40x = 30,339,545,377.17
  5. Step 5: Solve for x
    x = 30,339,545,377.17/235,665.40
  6. Step 6: Final answer
    x = 128,739.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.