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Finding the Fourth Proportional to 85,951.57, 128,979.19 and 36,703.57

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Solution

The fourth proportional to 85,951.57, 128,979.19 and 36,703.57 is: 55,077.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,951.57 : 128,979.19 = 36,703.57 : x
  2. Step 2: Convert to fraction form
    85,951.57/128,979.19 = 36,703.57/x
  3. Step 3: Cross multiply
    85,951.57x = 128,979.19 × 36,703.57
  4. Step 4: Simplify right side
    85,951.57x = 4,733,995,900.29
  5. Step 5: Solve for x
    x = 4,733,995,900.29/85,951.57
  6. Step 6: Final answer
    x = 55,077.48

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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.