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Finding the Fourth Proportional to 209,429.68, 288,991.36 and 124,530.36

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Solution

The fourth proportional to 209,429.68, 288,991.36 and 124,530.36 is: 171,839.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,429.68 : 288,991.36 = 124,530.36 : x
  2. Step 2: Convert to fraction form
    209,429.68/288,991.36 = 124,530.36/x
  3. Step 3: Cross multiply
    209,429.68x = 288,991.36 × 124,530.36
  4. Step 4: Simplify right side
    209,429.68x = 35,988,198,097.69
  5. Step 5: Solve for x
    x = 35,988,198,097.69/209,429.68
  6. Step 6: Final answer
    x = 171,839.05

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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.