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Finding the Fourth Proportional to 54,600.68, 81,868.73 and 21,281.86

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Solution

The fourth proportional to 54,600.68, 81,868.73 and 21,281.86 is: 31,910.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,600.68 : 81,868.73 = 21,281.86 : x
  2. Step 2: Convert to fraction form
    54,600.68/81,868.73 = 21,281.86/x
  3. Step 3: Cross multiply
    54,600.68x = 81,868.73 × 21,281.86
  4. Step 4: Simplify right side
    54,600.68x = 1,742,318,565.22
  5. Step 5: Solve for x
    x = 1,742,318,565.22/54,600.68
  6. Step 6: Final answer
    x = 31,910.20

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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.