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Finding the Fourth Proportional to 115,325.74, 158,913.31 and 85,063.12

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Solution

The fourth proportional to 115,325.74, 158,913.31 and 85,063.12 is: 117,212.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,325.74 : 158,913.31 = 85,063.12 : x
  2. Step 2: Convert to fraction form
    115,325.74/158,913.31 = 85,063.12/x
  3. Step 3: Cross multiply
    115,325.74x = 158,913.31 × 85,063.12
  4. Step 4: Simplify right side
    115,325.74x = 13,517,661,958.13
  5. Step 5: Solve for x
    x = 13,517,661,958.13/115,325.74
  6. Step 6: Final answer
    x = 117,212.88

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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.