Home / 209,002.60-288,469.04-128,499.12

Finding the Fourth Proportional to 209,002.60, 288,469.04 and 128,499.12

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Solution

The fourth proportional to 209,002.60, 288,469.04 and 128,499.12 is: 177,356.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,002.60 : 288,469.04 = 128,499.12 : x
  2. Step 2: Convert to fraction form
    209,002.60/288,469.04 = 128,499.12/x
  3. Step 3: Cross multiply
    209,002.60x = 288,469.04 × 128,499.12
  4. Step 4: Simplify right side
    209,002.60x = 37,068,017,787.24
  5. Step 5: Solve for x
    x = 37,068,017,787.24/209,002.60
  6. Step 6: Final answer
    x = 177,356.73

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1.5x scale

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.