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Finding the Fourth Proportional to 86,467.32, 129,662.10 and 83,745.72

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Solution

The fourth proportional to 86,467.32, 129,662.10 and 83,745.72 is: 125,580.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,467.32 : 129,662.10 = 83,745.72 : x
  2. Step 2: Convert to fraction form
    86,467.32/129,662.10 = 83,745.72/x
  3. Step 3: Cross multiply
    86,467.32x = 129,662.10 × 83,745.72
  4. Step 4: Simplify right side
    86,467.32x = 10,858,645,921.21
  5. Step 5: Solve for x
    x = 10,858,645,921.21/86,467.32
  6. Step 6: Final answer
    x = 125,580.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.