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Finding the Fourth Proportional to 72,076.40, 108,244.20 and 52,377.20

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Solution

The fourth proportional to 72,076.40, 108,244.20 and 52,377.20 is: 78,659.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,076.40 : 108,244.20 = 52,377.20 : x
  2. Step 2: Convert to fraction form
    72,076.40/108,244.20 = 52,377.20/x
  3. Step 3: Cross multiply
    72,076.40x = 108,244.20 × 52,377.20
  4. Step 4: Simplify right side
    72,076.40x = 5,669,528,112.24
  5. Step 5: Solve for x
    x = 5,669,528,112.24/72,076.40
  6. Step 6: Final answer
    x = 78,659.98

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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.