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Finding the Fourth Proportional to 100,365.72, 138,506.44 and 55,040.88

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Solution

The fourth proportional to 100,365.72, 138,506.44 and 55,040.88 is: 75,957.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,365.72 : 138,506.44 = 55,040.88 : x
  2. Step 2: Convert to fraction form
    100,365.72/138,506.44 = 55,040.88/x
  3. Step 3: Cross multiply
    100,365.72x = 138,506.44 × 55,040.88
  4. Step 4: Simplify right side
    100,365.72x = 7,623,516,343.27
  5. Step 5: Solve for x
    x = 7,623,516,343.27/100,365.72
  6. Step 6: Final answer
    x = 75,957.37

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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.