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Finding the Fourth Proportional to 138,071.72, 207,186.24 and 53,820.92

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Solution

The fourth proportional to 138,071.72, 207,186.24 and 53,820.92 is: 80,762.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,071.72 : 207,186.24 = 53,820.92 : x
  2. Step 2: Convert to fraction form
    138,071.72/207,186.24 = 53,820.92/x
  3. Step 3: Cross multiply
    138,071.72x = 207,186.24 × 53,820.92
  4. Step 4: Simplify right side
    138,071.72x = 11,150,954,048.14
  5. Step 5: Solve for x
    x = 11,150,954,048.14/138,071.72
  6. Step 6: Final answer
    x = 80,762.04

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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.