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Finding the Fourth Proportional to 40,887.78, 61,338.78 and 15,941.40

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Solution

The fourth proportional to 40,887.78, 61,338.78 and 15,941.40 is: 23,914.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,887.78 : 61,338.78 = 15,941.40 : x
  2. Step 2: Convert to fraction form
    40,887.78/61,338.78 = 15,941.40/x
  3. Step 3: Cross multiply
    40,887.78x = 61,338.78 × 15,941.40
  4. Step 4: Simplify right side
    40,887.78x = 977,826,027.49
  5. Step 5: Solve for x
    x = 977,826,027.49/40,887.78
  6. Step 6: Final answer
    x = 23,914.87

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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.