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Finding the Fourth Proportional to 66,791.05, 100,155.44 and 38,719.13

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Solution

The fourth proportional to 66,791.05, 100,155.44 and 38,719.13 is: 58,060.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,791.05 : 100,155.44 = 38,719.13 : x
  2. Step 2: Convert to fraction form
    66,791.05/100,155.44 = 38,719.13/x
  3. Step 3: Cross multiply
    66,791.05x = 100,155.44 × 38,719.13
  4. Step 4: Simplify right side
    66,791.05x = 3,877,931,097.59
  5. Step 5: Solve for x
    x = 3,877,931,097.59/66,791.05
  6. Step 6: Final answer
    x = 58,060.64

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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.