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Finding the Fourth Proportional to 214,038.40, 320,827.20 and 80,867.20

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Solution

The fourth proportional to 214,038.40, 320,827.20 and 80,867.20 is: 121,213.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,038.40 : 320,827.20 = 80,867.20 : x
  2. Step 2: Convert to fraction form
    214,038.40/320,827.20 = 80,867.20/x
  3. Step 3: Cross multiply
    214,038.40x = 320,827.20 × 80,867.20
  4. Step 4: Simplify right side
    214,038.40x = 25,944,397,347.84
  5. Step 5: Solve for x
    x = 25,944,397,347.84/214,038.40
  6. Step 6: Final answer
    x = 121,213.75

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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.