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Finding the Fourth Proportional to 76,322.60, 114,482.10 and 20,918.60

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Solution

The fourth proportional to 76,322.60, 114,482.10 and 20,918.60 is: 31,377.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,322.60 : 114,482.10 = 20,918.60 : x
  2. Step 2: Convert to fraction form
    76,322.60/114,482.10 = 20,918.60/x
  3. Step 3: Cross multiply
    76,322.60x = 114,482.10 × 20,918.60
  4. Step 4: Simplify right side
    76,322.60x = 2,394,805,257.06
  5. Step 5: Solve for x
    x = 2,394,805,257.06/76,322.60
  6. Step 6: Final answer
    x = 31,377.41

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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.