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Finding the Fourth Proportional to 66,960.64, 92,397.72 and 39,732.40

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Solution

The fourth proportional to 66,960.64, 92,397.72 and 39,732.40 is: 54,825.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,960.64 : 92,397.72 = 39,732.40 : x
  2. Step 2: Convert to fraction form
    66,960.64/92,397.72 = 39,732.40/x
  3. Step 3: Cross multiply
    66,960.64x = 92,397.72 × 39,732.40
  4. Step 4: Simplify right side
    66,960.64x = 3,671,183,170.13
  5. Step 5: Solve for x
    x = 3,671,183,170.13/66,960.64
  6. Step 6: Final answer
    x = 54,825.99

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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.