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Finding the Fourth Proportional to 66,758.16, 100,134.72 and 65,084.16

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Solution

The fourth proportional to 66,758.16, 100,134.72 and 65,084.16 is: 97,623.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,758.16 : 100,134.72 = 65,084.16 : x
  2. Step 2: Convert to fraction form
    66,758.16/100,134.72 = 65,084.16/x
  3. Step 3: Cross multiply
    66,758.16x = 100,134.72 × 65,084.16
  4. Step 4: Simplify right side
    66,758.16x = 6,517,184,138.04
  5. Step 5: Solve for x
    x = 6,517,184,138.04/66,758.16
  6. Step 6: Final answer
    x = 97,623.78

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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.