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Finding the Fourth Proportional to 85,139.41, 127,725.87 and 35,192.65

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Solution

The fourth proportional to 85,139.41, 127,725.87 and 35,192.65 is: 52,795.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,139.41 : 127,725.87 = 35,192.65 : x
  2. Step 2: Convert to fraction form
    85,139.41/127,725.87 = 35,192.65/x
  3. Step 3: Cross multiply
    85,139.41x = 127,725.87 × 35,192.65
  4. Step 4: Simplify right side
    85,139.41x = 4,495,011,838.86
  5. Step 5: Solve for x
    x = 4,495,011,838.86/85,139.41
  6. Step 6: Final answer
    x = 52,795.90

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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.