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Finding the Fourth Proportional to 78,062.50, 117,093.75 and 28,814.50

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Solution

The fourth proportional to 78,062.50, 117,093.75 and 28,814.50 is: 43,221.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,062.50 : 117,093.75 = 28,814.50 : x
  2. Step 2: Convert to fraction form
    78,062.50/117,093.75 = 28,814.50/x
  3. Step 3: Cross multiply
    78,062.50x = 117,093.75 × 28,814.50
  4. Step 4: Simplify right side
    78,062.50x = 3,373,997,859.38
  5. Step 5: Solve for x
    x = 3,373,997,859.38/78,062.50
  6. Step 6: Final answer
    x = 43,221.75

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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.