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Finding the Fourth Proportional to 72,915.30, 109,200.15 and 44,921.70

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Solution

The fourth proportional to 72,915.30, 109,200.15 and 44,921.70 is: 67,276.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,915.30 : 109,200.15 = 44,921.70 : x
  2. Step 2: Convert to fraction form
    72,915.30/109,200.15 = 44,921.70/x
  3. Step 3: Cross multiply
    72,915.30x = 109,200.15 × 44,921.70
  4. Step 4: Simplify right side
    72,915.30x = 4,905,456,378.26
  5. Step 5: Solve for x
    x = 4,905,456,378.26/72,915.30
  6. Step 6: Final answer
    x = 67,276.09

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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.