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Finding the Fourth Proportional to 109,355.13, 150,906.38 and 66,913.65

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Solution

The fourth proportional to 109,355.13, 150,906.38 and 66,913.65 is: 92,338.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,355.13 : 150,906.38 = 66,913.65 : x
  2. Step 2: Convert to fraction form
    109,355.13/150,906.38 = 66,913.65/x
  3. Step 3: Cross multiply
    109,355.13x = 150,906.38 × 66,913.65
  4. Step 4: Simplify right side
    109,355.13x = 10,097,696,359.52
  5. Step 5: Solve for x
    x = 10,097,696,359.52/109,355.13
  6. Step 6: Final answer
    x = 92,338.57

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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.