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Finding the Fourth Proportional to 235,079.81, 352,618.95 and 85,319.90

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Solution

The fourth proportional to 235,079.81, 352,618.95 and 85,319.90 is: 127,979.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,079.81 : 352,618.95 = 85,319.90 : x
  2. Step 2: Convert to fraction form
    235,079.81/352,618.95 = 85,319.90/x
  3. Step 3: Cross multiply
    235,079.81x = 352,618.95 × 85,319.90
  4. Step 4: Simplify right side
    235,079.81x = 30,085,414,753.60
  5. Step 5: Solve for x
    x = 30,085,414,753.60/235,079.81
  6. Step 6: Final answer
    x = 127,979.58

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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.