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Finding the Fourth Proportional to 54,570.60, 81,779.10 and 40,420.20

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Solution

The fourth proportional to 54,570.60, 81,779.10 and 40,420.20 is: 60,573.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,570.60 : 81,779.10 = 40,420.20 : x
  2. Step 2: Convert to fraction form
    54,570.60/81,779.10 = 40,420.20/x
  3. Step 3: Cross multiply
    54,570.60x = 81,779.10 × 40,420.20
  4. Step 4: Simplify right side
    54,570.60x = 3,305,527,577.82
  5. Step 5: Solve for x
    x = 3,305,527,577.82/54,570.60
  6. Step 6: Final answer
    x = 60,573.41

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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.