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Finding the Fourth Proportional to 91,764, 126,636.24 and 52,020

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Solution

The fourth proportional to 91,764, 126,636.24 and 52,020 is: 71,788.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,764 : 126,636.24 = 52,020 : x
  2. Step 2: Convert to fraction form
    91,764/126,636.24 = 52,020/x
  3. Step 3: Cross multiply
    91,764x = 126,636.24 × 52,020
  4. Step 4: Simplify right side
    91,764x = 6,587,617,204.80
  5. Step 5: Solve for x
    x = 6,587,617,204.80/91,764
  6. Step 6: Final answer
    x = 71,788.69

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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.