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Finding the Fourth Proportional to 91,759.40, 137,639.10 and 65,187.35

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Solution

The fourth proportional to 91,759.40, 137,639.10 and 65,187.35 is: 97,781.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,759.40 : 137,639.10 = 65,187.35 : x
  2. Step 2: Convert to fraction form
    91,759.40/137,639.10 = 65,187.35/x
  3. Step 3: Cross multiply
    91,759.40x = 137,639.10 × 65,187.35
  4. Step 4: Simplify right side
    91,759.40x = 8,972,328,185.39
  5. Step 5: Solve for x
    x = 8,972,328,185.39/91,759.40
  6. Step 6: Final answer
    x = 97,781.03

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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.