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Finding the Fourth Proportional to 52,720, 79,080.08 and 21,555.20

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Solution

The fourth proportional to 52,720, 79,080.08 and 21,555.20 is: 32,332.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,720 : 79,080.08 = 21,555.20 : x
  2. Step 2: Convert to fraction form
    52,720/79,080.08 = 21,555.20/x
  3. Step 3: Cross multiply
    52,720x = 79,080.08 × 21,555.20
  4. Step 4: Simplify right side
    52,720x = 1,704,586,940.42
  5. Step 5: Solve for x
    x = 1,704,586,940.42/52,720
  6. Step 6: Final answer
    x = 32,332.83

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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.