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Finding the Fourth Proportional to 214,468.80, 321,703.20 and 81,304.80

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Solution

The fourth proportional to 214,468.80, 321,703.20 and 81,304.80 is: 121,957.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,468.80 : 321,703.20 = 81,304.80 : x
  2. Step 2: Convert to fraction form
    214,468.80/321,703.20 = 81,304.80/x
  3. Step 3: Cross multiply
    214,468.80x = 321,703.20 × 81,304.80
  4. Step 4: Simplify right side
    214,468.80x = 26,156,014,335.36
  5. Step 5: Solve for x
    x = 26,156,014,335.36/214,468.80
  6. Step 6: Final answer
    x = 121,957.20

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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.