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Finding the Fourth Proportional to 76,266.62, 105,212.33 and 47,987.90

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Solution

The fourth proportional to 76,266.62, 105,212.33 and 47,987.90 is: 66,200.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,266.62 : 105,212.33 = 47,987.90 : x
  2. Step 2: Convert to fraction form
    76,266.62/105,212.33 = 47,987.90/x
  3. Step 3: Cross multiply
    76,266.62x = 105,212.33 × 47,987.90
  4. Step 4: Simplify right side
    76,266.62x = 5,048,918,770.81
  5. Step 5: Solve for x
    x = 5,048,918,770.81/76,266.62
  6. Step 6: Final answer
    x = 66,200.90

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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.