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Finding the Fourth Proportional to 78,153.08, 107,791.73 and 67,269.74

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Solution

The fourth proportional to 78,153.08, 107,791.73 and 67,269.74 is: 92,781.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,153.08 : 107,791.73 = 67,269.74 : x
  2. Step 2: Convert to fraction form
    78,153.08/107,791.73 = 67,269.74/x
  3. Step 3: Cross multiply
    78,153.08x = 107,791.73 × 67,269.74
  4. Step 4: Simplify right side
    78,153.08x = 7,251,121,028.20
  5. Step 5: Solve for x
    x = 7,251,121,028.20/78,153.08
  6. Step 6: Final answer
    x = 92,781.01

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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.