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Finding the Fourth Proportional to 76,989.69, 106,187.14 and 66,252.46

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Solution

The fourth proportional to 76,989.69, 106,187.14 and 66,252.46 is: 91,377.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,989.69 : 106,187.14 = 66,252.46 : x
  2. Step 2: Convert to fraction form
    76,989.69/106,187.14 = 66,252.46/x
  3. Step 3: Cross multiply
    76,989.69x = 106,187.14 × 66,252.46
  4. Step 4: Simplify right side
    76,989.69x = 7,035,158,996.35
  5. Step 5: Solve for x
    x = 7,035,158,996.35/76,989.69
  6. Step 6: Final answer
    x = 91,377.94

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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.