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Finding the Fourth Proportional to 73,912.13, 101,998.74 and 39,920.61

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Solution

The fourth proportional to 73,912.13, 101,998.74 and 39,920.61 is: 55,090.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,912.13 : 101,998.74 = 39,920.61 : x
  2. Step 2: Convert to fraction form
    73,912.13/101,998.74 = 39,920.61/x
  3. Step 3: Cross multiply
    73,912.13x = 101,998.74 × 39,920.61
  4. Step 4: Simplify right side
    73,912.13x = 4,071,851,920.03
  5. Step 5: Solve for x
    x = 4,071,851,920.03/73,912.13
  6. Step 6: Final answer
    x = 55,090.45

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1.5x scale

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.