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Finding the Fourth Proportional to 85,894.44, 128,884.63 and 38,543.39

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Solution

The fourth proportional to 85,894.44, 128,884.63 and 38,543.39 is: 57,834.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,894.44 : 128,884.63 = 38,543.39 : x
  2. Step 2: Convert to fraction form
    85,894.44/128,884.63 = 38,543.39/x
  3. Step 3: Cross multiply
    85,894.44x = 128,884.63 × 38,543.39
  4. Step 4: Simplify right side
    85,894.44x = 4,967,650,366.38
  5. Step 5: Solve for x
    x = 4,967,650,366.38/85,894.44
  6. Step 6: Final answer
    x = 57,834.37

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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.