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Finding the Fourth Proportional to 49,451, 74,185.80 and 19,871.18

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Solution

The fourth proportional to 49,451, 74,185.80 and 19,871.18 is: 29,810.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,451 : 74,185.80 = 19,871.18 : x
  2. Step 2: Convert to fraction form
    49,451/74,185.80 = 19,871.18/x
  3. Step 3: Cross multiply
    49,451x = 74,185.80 × 19,871.18
  4. Step 4: Simplify right side
    49,451x = 1,474,159,385.24
  5. Step 5: Solve for x
    x = 1,474,159,385.24/49,451
  6. Step 6: Final answer
    x = 29,810.51

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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.