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Finding the Fourth Proportional to 57,622, 79,518.36 and 31,126

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Solution

The fourth proportional to 57,622, 79,518.36 and 31,126 is: 42,953.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,622 : 79,518.36 = 31,126 : x
  2. Step 2: Convert to fraction form
    57,622/79,518.36 = 31,126/x
  3. Step 3: Cross multiply
    57,622x = 79,518.36 × 31,126
  4. Step 4: Simplify right side
    57,622x = 2,475,088,473.36
  5. Step 5: Solve for x
    x = 2,475,088,473.36/57,622
  6. Step 6: Final answer
    x = 42,953.88

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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.