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Finding the Fourth Proportional to 65,759.16, 90,719.76 and 40,255.92

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Solution

The fourth proportional to 65,759.16, 90,719.76 and 40,255.92 is: 55,536.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,759.16 : 90,719.76 = 40,255.92 : x
  2. Step 2: Convert to fraction form
    65,759.16/90,719.76 = 40,255.92/x
  3. Step 3: Cross multiply
    65,759.16x = 90,719.76 × 40,255.92
  4. Step 4: Simplify right side
    65,759.16x = 3,652,007,400.98
  5. Step 5: Solve for x
    x = 3,652,007,400.98/65,759.16
  6. Step 6: Final answer
    x = 55,536.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.