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Finding the Fourth Proportional to 78,551.53, 117,832.76 and 25,997.92

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Solution

The fourth proportional to 78,551.53, 117,832.76 and 25,997.92 is: 38,998.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,551.53 : 117,832.76 = 25,997.92 : x
  2. Step 2: Convert to fraction form
    78,551.53/117,832.76 = 25,997.92/x
  3. Step 3: Cross multiply
    78,551.53x = 117,832.76 × 25,997.92
  4. Step 4: Simplify right side
    78,551.53x = 3,063,406,667.86
  5. Step 5: Solve for x
    x = 3,063,406,667.86/78,551.53
  6. Step 6: Final answer
    x = 38,998.69

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1.5x scale

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.