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Finding the Fourth Proportional to 70,137.90, 96,766.29 and 39,915.65

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Solution

The fourth proportional to 70,137.90, 96,766.29 and 39,915.65 is: 55,069.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,137.90 : 96,766.29 = 39,915.65 : x
  2. Step 2: Convert to fraction form
    70,137.90/96,766.29 = 39,915.65/x
  3. Step 3: Cross multiply
    70,137.90x = 96,766.29 × 39,915.65
  4. Step 4: Simplify right side
    70,137.90x = 3,862,489,907.70
  5. Step 5: Solve for x
    x = 3,862,489,907.70/70,137.90
  6. Step 6: Final answer
    x = 55,069.94

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1.5x scale

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.