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Finding the Fourth Proportional to 74,100, 111,166.92 and 21,513.72

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Solution

The fourth proportional to 74,100, 111,166.92 and 21,513.72 is: 32,275.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,100 : 111,166.92 = 21,513.72 : x
  2. Step 2: Convert to fraction form
    74,100/111,166.92 = 21,513.72/x
  3. Step 3: Cross multiply
    74,100x = 111,166.92 × 21,513.72
  4. Step 4: Simplify right side
    74,100x = 2,391,613,990.14
  5. Step 5: Solve for x
    x = 2,391,613,990.14/74,100
  6. Step 6: Final answer
    x = 32,275.49

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1.5x scale

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.