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Finding the Fourth Proportional to 39,990.78, 55,192.14 and 23,223.78

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Solution

The fourth proportional to 39,990.78, 55,192.14 and 23,223.78 is: 32,051.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,990.78 : 55,192.14 = 23,223.78 : x
  2. Step 2: Convert to fraction form
    39,990.78/55,192.14 = 23,223.78/x
  3. Step 3: Cross multiply
    39,990.78x = 55,192.14 × 23,223.78
  4. Step 4: Simplify right side
    39,990.78x = 1,281,770,117.09
  5. Step 5: Solve for x
    x = 1,281,770,117.09/39,990.78
  6. Step 6: Final answer
    x = 32,051.64

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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.