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Finding the Fourth Proportional to 65,697, 90,834.66 and 62,759.40

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Solution

The fourth proportional to 65,697, 90,834.66 and 62,759.40 is: 86,773.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,697 : 90,834.66 = 62,759.40 : x
  2. Step 2: Convert to fraction form
    65,697/90,834.66 = 62,759.40/x
  3. Step 3: Cross multiply
    65,697x = 90,834.66 × 62,759.40
  4. Step 4: Simplify right side
    65,697x = 5,700,728,760.80
  5. Step 5: Solve for x
    x = 5,700,728,760.80/65,697
  6. Step 6: Final answer
    x = 86,773.05

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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.