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Finding the Fourth Proportional to 72,858,500.80, 109,413,722.40 and 38,846,276.80

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Solution

The fourth proportional to 72,858,500.80, 109,413,722.40 and 38,846,276.80 is: 58,336,579.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,858,500.80 : 109,413,722.40 = 38,846,276.80 : x
  2. Step 2: Convert to fraction form
    72,858,500.80/109,413,722.40 = 38,846,276.80/x
  3. Step 3: Cross multiply
    72,858,500.80x = 109,413,722.40 × 38,846,276.80
  4. Step 4: Simplify right side
    72,858,500.80x = 4,250,315,746,068,760
  5. Step 5: Solve for x
    x = 4,250,315,746,068,760/72,858,500.80
  6. Step 6: Final answer
    x = 58,336,579.80

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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.