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Finding the Fourth Proportional to 209,361.20, 288,795.32 and 124,473.20

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Solution

The fourth proportional to 209,361.20, 288,795.32 and 124,473.20 is: 171,699.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,361.20 : 288,795.32 = 124,473.20 : x
  2. Step 2: Convert to fraction form
    209,361.20/288,795.32 = 124,473.20/x
  3. Step 3: Cross multiply
    209,361.20x = 288,795.32 × 124,473.20
  4. Step 4: Simplify right side
    209,361.20x = 35,947,275,559.08
  5. Step 5: Solve for x
    x = 35,947,275,559.08/209,361.20
  6. Step 6: Final answer
    x = 171,699.80

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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.