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Finding the Fourth Proportional to 92,961.04, 128,304.88 and 55,228

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Solution

The fourth proportional to 92,961.04, 128,304.88 and 55,228 is: 76,225.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,961.04 : 128,304.88 = 55,228 : x
  2. Step 2: Convert to fraction form
    92,961.04/128,304.88 = 55,228/x
  3. Step 3: Cross multiply
    92,961.04x = 128,304.88 × 55,228
  4. Step 4: Simplify right side
    92,961.04x = 7,086,021,912.64
  5. Step 5: Solve for x
    x = 7,086,021,912.64/92,961.04
  6. Step 6: Final answer
    x = 76,225.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.