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Finding the Fourth Proportional to 71,915.40, 108,002.70 and 52,216.20

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Solution

The fourth proportional to 71,915.40, 108,002.70 and 52,216.20 is: 78,418.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,915.40 : 108,002.70 = 52,216.20 : x
  2. Step 2: Convert to fraction form
    71,915.40/108,002.70 = 52,216.20/x
  3. Step 3: Cross multiply
    71,915.40x = 108,002.70 × 52,216.20
  4. Step 4: Simplify right side
    71,915.40x = 5,639,490,583.74
  5. Step 5: Solve for x
    x = 5,639,490,583.74/71,915.40
  6. Step 6: Final answer
    x = 78,418.40

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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.