Home / 54,420.12-81,685.80-28,143.72

Finding the Fourth Proportional to 54,420.12, 81,685.80 and 28,143.72

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Solution

The fourth proportional to 54,420.12, 81,685.80 and 28,143.72 is: 42,244.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,420.12 : 81,685.80 = 28,143.72 : x
  2. Step 2: Convert to fraction form
    54,420.12/81,685.80 = 28,143.72/x
  3. Step 3: Cross multiply
    54,420.12x = 81,685.80 × 28,143.72
  4. Step 4: Simplify right side
    54,420.12x = 2,298,942,283.18
  5. Step 5: Solve for x
    x = 2,298,942,283.18/54,420.12
  6. Step 6: Final answer
    x = 42,244.34

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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.