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Finding the Fourth Proportional to 71,225.60, 106,915.20 and 40,121.60

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Solution

The fourth proportional to 71,225.60, 106,915.20 and 40,121.60 is: 60,225.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,225.60 : 106,915.20 = 40,121.60 : x
  2. Step 2: Convert to fraction form
    71,225.60/106,915.20 = 40,121.60/x
  3. Step 3: Cross multiply
    71,225.60x = 106,915.20 × 40,121.60
  4. Step 4: Simplify right side
    71,225.60x = 4,289,608,888.32
  5. Step 5: Solve for x
    x = 4,289,608,888.32/71,225.60
  6. Step 6: Final answer
    x = 60,225.66

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1.5x scale

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.