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Finding the Fourth Proportional to 54,643.80, 81,965.70 and 17,707.80

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Solution

The fourth proportional to 54,643.80, 81,965.70 and 17,707.80 is: 26,561.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,643.80 : 81,965.70 = 17,707.80 : x
  2. Step 2: Convert to fraction form
    54,643.80/81,965.70 = 17,707.80/x
  3. Step 3: Cross multiply
    54,643.80x = 81,965.70 × 17,707.80
  4. Step 4: Simplify right side
    54,643.80x = 1,451,432,222.46
  5. Step 5: Solve for x
    x = 1,451,432,222.46/54,643.80
  6. Step 6: Final answer
    x = 26,561.70

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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.