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Finding the Fourth Proportional to 66,788.80, 100,152.06 and 38,716.88

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Solution

The fourth proportional to 66,788.80, 100,152.06 and 38,716.88 is: 58,057.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,788.80 : 100,152.06 = 38,716.88 : x
  2. Step 2: Convert to fraction form
    66,788.80/100,152.06 = 38,716.88/x
  3. Step 3: Cross multiply
    66,788.80x = 100,152.06 × 38,716.88
  4. Step 4: Simplify right side
    66,788.80x = 3,877,575,800.69
  5. Step 5: Solve for x
    x = 3,877,575,800.69/66,788.80
  6. Step 6: Final answer
    x = 58,057.27

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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.