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Finding the Fourth Proportional to 51,391.61, 70,942.28 and 31,254.96

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Solution

The fourth proportional to 51,391.61, 70,942.28 and 31,254.96 is: 43,145.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,391.61 : 70,942.28 = 31,254.96 : x
  2. Step 2: Convert to fraction form
    51,391.61/70,942.28 = 31,254.96/x
  3. Step 3: Cross multiply
    51,391.61x = 70,942.28 × 31,254.96
  4. Step 4: Simplify right side
    51,391.61x = 2,217,297,690.86
  5. Step 5: Solve for x
    x = 2,217,297,690.86/51,391.61
  6. Step 6: Final answer
    x = 43,145.13

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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.