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Finding the Fourth Proportional to 57,320.32, 85,788.32 and 42,040.48

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Solution

The fourth proportional to 57,320.32, 85,788.32 and 42,040.48 is: 62,919.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,320.32 : 85,788.32 = 42,040.48 : x
  2. Step 2: Convert to fraction form
    57,320.32/85,788.32 = 42,040.48/x
  3. Step 3: Cross multiply
    57,320.32x = 85,788.32 × 42,040.48
  4. Step 4: Simplify right side
    57,320.32x = 3,606,582,151.19
  5. Step 5: Solve for x
    x = 3,606,582,151.19/57,320.32
  6. Step 6: Final answer
    x = 62,919.78

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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.