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Finding the Fourth Proportional to 78,097.74, 107,694.33 and 66,804.62

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Solution

The fourth proportional to 78,097.74, 107,694.33 and 66,804.62 is: 92,121.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,097.74 : 107,694.33 = 66,804.62 : x
  2. Step 2: Convert to fraction form
    78,097.74/107,694.33 = 66,804.62/x
  3. Step 3: Cross multiply
    78,097.74x = 107,694.33 × 66,804.62
  4. Step 4: Simplify right side
    78,097.74x = 7,194,478,253.33
  5. Step 5: Solve for x
    x = 7,194,478,253.33/78,097.74
  6. Step 6: Final answer
    x = 92,121.47

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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.