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Finding the Fourth Proportional to 91,768.80, 126,638.40 and 54,045.60

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Solution

The fourth proportional to 91,768.80, 126,638.40 and 54,045.60 is: 74,581.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,768.80 : 126,638.40 = 54,045.60 : x
  2. Step 2: Convert to fraction form
    91,768.80/126,638.40 = 54,045.60/x
  3. Step 3: Cross multiply
    91,768.80x = 126,638.40 × 54,045.60
  4. Step 4: Simplify right side
    91,768.80x = 6,844,248,311.04
  5. Step 5: Solve for x
    x = 6,844,248,311.04/91,768.80
  6. Step 6: Final answer
    x = 74,581.43

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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.