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Finding the Fourth Proportional to 61,849.64, 85,262.66 and 40,591.72

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Solution

The fourth proportional to 61,849.64, 85,262.66 and 40,591.72 is: 55,957.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,849.64 : 85,262.66 = 40,591.72 : x
  2. Step 2: Convert to fraction form
    61,849.64/85,262.66 = 40,591.72/x
  3. Step 3: Cross multiply
    61,849.64x = 85,262.66 × 40,591.72
  4. Step 4: Simplify right side
    61,849.64x = 3,460,958,021.18
  5. Step 5: Solve for x
    x = 3,460,958,021.18/61,849.64
  6. Step 6: Final answer
    x = 55,957.61

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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.