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Finding the Fourth Proportional to 91,692.66, 136,918.18 and 72,760.16

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Solution

The fourth proportional to 91,692.66, 136,918.18 and 72,760.16 is: 108,647.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,692.66 : 136,918.18 = 72,760.16 : x
  2. Step 2: Convert to fraction form
    91,692.66/136,918.18 = 72,760.16/x
  3. Step 3: Cross multiply
    91,692.66x = 136,918.18 × 72,760.16
  4. Step 4: Simplify right side
    91,692.66x = 9,962,188,683.71
  5. Step 5: Solve for x
    x = 9,962,188,683.71/91,692.66
  6. Step 6: Final answer
    x = 108,647.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.