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Finding the Fourth Proportional to 220,672, 331,073.28 and 127,244.80

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Solution

The fourth proportional to 220,672, 331,073.28 and 127,244.80 is: 190,904.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,672 : 331,073.28 = 127,244.80 : x
  2. Step 2: Convert to fraction form
    220,672/331,073.28 = 127,244.80/x
  3. Step 3: Cross multiply
    220,672x = 331,073.28 × 127,244.80
  4. Step 4: Simplify right side
    220,672x = 42,127,353,298.94
  5. Step 5: Solve for x
    x = 42,127,353,298.94/220,672
  6. Step 6: Final answer
    x = 190,904.84

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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.