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Finding the Fourth Proportional to 85,702.56, 128,636.85 and 41,360.46

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Solution

The fourth proportional to 85,702.56, 128,636.85 and 41,360.46 is: 62,080.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,702.56 : 128,636.85 = 41,360.46 : x
  2. Step 2: Convert to fraction form
    85,702.56/128,636.85 = 41,360.46/x
  3. Step 3: Cross multiply
    85,702.56x = 128,636.85 × 41,360.46
  4. Step 4: Simplify right side
    85,702.56x = 5,320,479,288.95
  5. Step 5: Solve for x
    x = 5,320,479,288.95/85,702.56
  6. Step 6: Final answer
    x = 62,080.75

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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.