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Finding the Fourth Proportional to 209,392.50, 288,961.79 and 118,719.48

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Solution

The fourth proportional to 209,392.50, 288,961.79 and 118,719.48 is: 163,832.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,392.50 : 288,961.79 = 118,719.48 : x
  2. Step 2: Convert to fraction form
    209,392.50/288,961.79 = 118,719.48/x
  3. Step 3: Cross multiply
    209,392.50x = 288,961.79 × 118,719.48
  4. Step 4: Simplify right side
    209,392.50x = 34,305,392,855.07
  5. Step 5: Solve for x
    x = 34,305,392,855.07/209,392.50
  6. Step 6: Final answer
    x = 163,832.96

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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.