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Finding the Fourth Proportional to 159,189.39, 219,684.76 and 87,569.42

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Solution

The fourth proportional to 159,189.39, 219,684.76 and 87,569.42 is: 120,847.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,189.39 : 219,684.76 = 87,569.42 : x
  2. Step 2: Convert to fraction form
    159,189.39/219,684.76 = 87,569.42/x
  3. Step 3: Cross multiply
    159,189.39x = 219,684.76 × 87,569.42
  4. Step 4: Simplify right side
    159,189.39x = 19,237,665,698.69
  5. Step 5: Solve for x
    x = 19,237,665,698.69/159,189.39
  6. Step 6: Final answer
    x = 120,847.66

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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.