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Finding the Fourth Proportional to 85,825.95, 128,717.37 and 40,819.53

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Solution

The fourth proportional to 85,825.95, 128,717.37 and 40,819.53 is: 61,219.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,825.95 : 128,717.37 = 40,819.53 : x
  2. Step 2: Convert to fraction form
    85,825.95/128,717.37 = 40,819.53/x
  3. Step 3: Cross multiply
    85,825.95x = 128,717.37 × 40,819.53
  4. Step 4: Simplify right side
    85,825.95x = 5,254,182,546.24
  5. Step 5: Solve for x
    x = 5,254,182,546.24/85,825.95
  6. Step 6: Final answer
    x = 61,219.04

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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.