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Finding the Fourth Proportional to 65,278.88, 90,084.96 and 36,986.48

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Solution

The fourth proportional to 65,278.88, 90,084.96 and 36,986.48 is: 51,041.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,278.88 : 90,084.96 = 36,986.48 : x
  2. Step 2: Convert to fraction form
    65,278.88/90,084.96 = 36,986.48/x
  3. Step 3: Cross multiply
    65,278.88x = 90,084.96 × 36,986.48
  4. Step 4: Simplify right side
    65,278.88x = 3,331,925,120.92
  5. Step 5: Solve for x
    x = 3,331,925,120.92/65,278.88
  6. Step 6: Final answer
    x = 51,041.40

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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.