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Finding the Fourth Proportional to 138,888.53, 207,118.79 and 123,579.53

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Solution

The fourth proportional to 138,888.53, 207,118.79 and 123,579.53 is: 184,289.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,888.53 : 207,118.79 = 123,579.53 : x
  2. Step 2: Convert to fraction form
    138,888.53/207,118.79 = 123,579.53/x
  3. Step 3: Cross multiply
    138,888.53x = 207,118.79 × 123,579.53
  4. Step 4: Simplify right side
    138,888.53x = 25,595,642,622.27
  5. Step 5: Solve for x
    x = 25,595,642,622.27/138,888.53
  6. Step 6: Final answer
    x = 184,289.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.