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Finding the Fourth Proportional to 209,334.76, 288,735.60 and 137,691.88

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Solution

The fourth proportional to 209,334.76, 288,735.60 and 137,691.88 is: 189,918.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,334.76 : 288,735.60 = 137,691.88 : x
  2. Step 2: Convert to fraction form
    209,334.76/288,735.60 = 137,691.88/x
  3. Step 3: Cross multiply
    209,334.76x = 288,735.60 × 137,691.88
  4. Step 4: Simplify right side
    209,334.76x = 39,756,547,586.93
  5. Step 5: Solve for x
    x = 39,756,547,586.93/209,334.76
  6. Step 6: Final answer
    x = 189,918.52

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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.