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Finding the Fourth Proportional to 209,321.80, 288,762.52 and 124,378.72

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Solution

The fourth proportional to 209,321.80, 288,762.52 and 124,378.72 is: 171,582.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,321.80 : 288,762.52 = 124,378.72 : x
  2. Step 2: Convert to fraction form
    209,321.80/288,762.52 = 124,378.72/x
  3. Step 3: Cross multiply
    209,321.80x = 288,762.52 × 124,378.72
  4. Step 4: Simplify right side
    209,321.80x = 35,915,912,621.57
  5. Step 5: Solve for x
    x = 35,915,912,621.57/209,321.80
  6. Step 6: Final answer
    x = 171,582.28

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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.