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Finding the Fourth Proportional to 115,161.75, 158,928.15 and 64,174.55

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Solution

The fourth proportional to 115,161.75, 158,928.15 and 64,174.55 is: 88,563.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,161.75 : 158,928.15 = 64,174.55 : x
  2. Step 2: Convert to fraction form
    115,161.75/158,928.15 = 64,174.55/x
  3. Step 3: Cross multiply
    115,161.75x = 158,928.15 × 64,174.55
  4. Step 4: Simplify right side
    115,161.75x = 10,199,142,508.58
  5. Step 5: Solve for x
    x = 10,199,142,508.58/115,161.75
  6. Step 6: Final answer
    x = 88,563.63

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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.