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Finding the Fourth Proportional to 40,903.20, 61,279.20 and 23,320.80

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Solution

The fourth proportional to 40,903.20, 61,279.20 and 23,320.80 is: 34,938.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,903.20 : 61,279.20 = 23,320.80 : x
  2. Step 2: Convert to fraction form
    40,903.20/61,279.20 = 23,320.80/x
  3. Step 3: Cross multiply
    40,903.20x = 61,279.20 × 23,320.80
  4. Step 4: Simplify right side
    40,903.20x = 1,429,079,967.36
  5. Step 5: Solve for x
    x = 1,429,079,967.36/40,903.20
  6. Step 6: Final answer
    x = 34,938.10

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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.