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Finding the Fourth Proportional to 207,716.40, 311,574.60 and 74,617.20

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Solution

The fourth proportional to 207,716.40, 311,574.60 and 74,617.20 is: 111,925.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,716.40 : 311,574.60 = 74,617.20 : x
  2. Step 2: Convert to fraction form
    207,716.40/311,574.60 = 74,617.20/x
  3. Step 3: Cross multiply
    207,716.40x = 311,574.60 × 74,617.20
  4. Step 4: Simplify right side
    207,716.40x = 23,248,824,243.12
  5. Step 5: Solve for x
    x = 23,248,824,243.12/207,716.40
  6. Step 6: Final answer
    x = 111,925.80

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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.