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Finding the Fourth Proportional to 67,915.60, 101,879.02 and 21,168.46

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Solution

The fourth proportional to 67,915.60, 101,879.02 and 21,168.46 is: 31,754.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,915.60 : 101,879.02 = 21,168.46 : x
  2. Step 2: Convert to fraction form
    67,915.60/101,879.02 = 21,168.46/x
  3. Step 3: Cross multiply
    67,915.60x = 101,879.02 × 21,168.46
  4. Step 4: Simplify right side
    67,915.60x = 2,156,621,959.71
  5. Step 5: Solve for x
    x = 2,156,621,959.71/67,915.60
  6. Step 6: Final answer
    x = 31,754.44

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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.