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Finding the Fourth Proportional to 139,881.01, 209,883.53 and 73,305.31

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Solution

The fourth proportional to 139,881.01, 209,883.53 and 73,305.31 is: 109,990.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,881.01 : 209,883.53 = 73,305.31 : x
  2. Step 2: Convert to fraction form
    139,881.01/209,883.53 = 73,305.31/x
  3. Step 3: Cross multiply
    139,881.01x = 209,883.53 × 73,305.31
  4. Step 4: Simplify right side
    139,881.01x = 15,385,576,614.20
  5. Step 5: Solve for x
    x = 15,385,576,614.20/139,881.01
  6. Step 6: Final answer
    x = 109,990.46

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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.