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Finding the Fourth Proportional to 61,874.74, 85,343.03 and 56,786.64

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Solution

The fourth proportional to 61,874.74, 85,343.03 and 56,786.64 is: 78,325.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,874.74 : 85,343.03 = 56,786.64 : x
  2. Step 2: Convert to fraction form
    61,874.74/85,343.03 = 56,786.64/x
  3. Step 3: Cross multiply
    61,874.74x = 85,343.03 × 56,786.64
  4. Step 4: Simplify right side
    61,874.74x = 4,846,343,921.12
  5. Step 5: Solve for x
    x = 4,846,343,921.12/61,874.74
  6. Step 6: Final answer
    x = 78,325.08

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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.