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Finding the Fourth Proportional to 54,617.69, 81,868.22 and 38,987.93

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Solution

The fourth proportional to 54,617.69, 81,868.22 and 38,987.93 is: 58,440.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,617.69 : 81,868.22 = 38,987.93 : x
  2. Step 2: Convert to fraction form
    54,617.69/81,868.22 = 38,987.93/x
  3. Step 3: Cross multiply
    54,617.69x = 81,868.22 × 38,987.93
  4. Step 4: Simplify right side
    54,617.69x = 3,191,872,586.52
  5. Step 5: Solve for x
    x = 3,191,872,586.52/54,617.69
  6. Step 6: Final answer
    x = 58,440.27

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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.