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Finding the Fourth Proportional to 86,640.81, 129,961.12 and 32,615.57

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Solution

The fourth proportional to 86,640.81, 129,961.12 and 32,615.57 is: 48,923.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,640.81 : 129,961.12 = 32,615.57 : x
  2. Step 2: Convert to fraction form
    86,640.81/129,961.12 = 32,615.57/x
  3. Step 3: Cross multiply
    86,640.81x = 129,961.12 × 32,615.57
  4. Step 4: Simplify right side
    86,640.81x = 4,238,756,006.64
  5. Step 5: Solve for x
    x = 4,238,756,006.64/86,640.81
  6. Step 6: Final answer
    x = 48,923.32

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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.