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Finding the Fourth Proportional to 70,915.80, 97,863.32 and 39,084.72

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Solution

The fourth proportional to 70,915.80, 97,863.32 and 39,084.72 is: 53,936.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,915.80 : 97,863.32 = 39,084.72 : x
  2. Step 2: Convert to fraction form
    70,915.80/97,863.32 = 39,084.72/x
  3. Step 3: Cross multiply
    70,915.80x = 97,863.32 × 39,084.72
  4. Step 4: Simplify right side
    70,915.80x = 3,824,960,460.47
  5. Step 5: Solve for x
    x = 3,824,960,460.47/70,915.80
  6. Step 6: Final answer
    x = 53,936.65

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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.