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Finding the Fourth Proportional to 90,611.46, 125,161.47 and 68,969.70

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Solution

The fourth proportional to 90,611.46, 125,161.47 and 68,969.70 is: 95,267.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,611.46 : 125,161.47 = 68,969.70 : x
  2. Step 2: Convert to fraction form
    90,611.46/125,161.47 = 68,969.70/x
  3. Step 3: Cross multiply
    90,611.46x = 125,161.47 × 68,969.70
  4. Step 4: Simplify right side
    90,611.46x = 8,632,349,037.46
  5. Step 5: Solve for x
    x = 8,632,349,037.46/90,611.46
  6. Step 6: Final answer
    x = 95,267.74

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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.