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Finding the Fourth Proportional to 72,292.77, 108,421.69 and 27,891.20

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Solution

The fourth proportional to 72,292.77, 108,421.69 and 27,891.20 is: 41,830.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,292.77 : 108,421.69 = 27,891.20 : x
  2. Step 2: Convert to fraction form
    72,292.77/108,421.69 = 27,891.20/x
  3. Step 3: Cross multiply
    72,292.77x = 108,421.69 × 27,891.20
  4. Step 4: Simplify right side
    72,292.77x = 3,024,010,900.67
  5. Step 5: Solve for x
    x = 3,024,010,900.67/72,292.77
  6. Step 6: Final answer
    x = 41,830.06

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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.