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Finding the Fourth Proportional to 84,573.48, 126,859.86 and 21,394.20

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Solution

The fourth proportional to 84,573.48, 126,859.86 and 21,394.20 is: 32,091.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,573.48 : 126,859.86 = 21,394.20 : x
  2. Step 2: Convert to fraction form
    84,573.48/126,859.86 = 21,394.20/x
  3. Step 3: Cross multiply
    84,573.48x = 126,859.86 × 21,394.20
  4. Step 4: Simplify right side
    84,573.48x = 2,714,065,216.81
  5. Step 5: Solve for x
    x = 2,714,065,216.81/84,573.48
  6. Step 6: Final answer
    x = 32,091.21

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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.