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Finding the Fourth Proportional to 54,653.68, 81,980.54 and 42,191.90

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Solution

The fourth proportional to 54,653.68, 81,980.54 and 42,191.90 is: 63,287.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,653.68 : 81,980.54 = 42,191.90 : x
  2. Step 2: Convert to fraction form
    54,653.68/81,980.54 = 42,191.90/x
  3. Step 3: Cross multiply
    54,653.68x = 81,980.54 × 42,191.90
  4. Step 4: Simplify right side
    54,653.68x = 3,458,914,745.63
  5. Step 5: Solve for x
    x = 3,458,914,745.63/54,653.68
  6. Step 6: Final answer
    x = 63,287.87

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1.5x scale

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.