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Finding the Fourth Proportional to 61,919.41, 85,410.11 and 51,544.72

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Solution

The fourth proportional to 61,919.41, 85,410.11 and 51,544.72 is: 71,099.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,919.41 : 85,410.11 = 51,544.72 : x
  2. Step 2: Convert to fraction form
    61,919.41/85,410.11 = 51,544.72/x
  3. Step 3: Cross multiply
    61,919.41x = 85,410.11 × 51,544.72
  4. Step 4: Simplify right side
    61,919.41x = 4,402,440,205.12
  5. Step 5: Solve for x
    x = 4,402,440,205.12/61,919.41
  6. Step 6: Final answer
    x = 71,099.52

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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.