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Finding the Fourth Proportional to 56,463.75, 77,920.11 and 31,318.11

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Solution

The fourth proportional to 56,463.75, 77,920.11 and 31,318.11 is: 43,219.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,463.75 : 77,920.11 = 31,318.11 : x
  2. Step 2: Convert to fraction form
    56,463.75/77,920.11 = 31,318.11/x
  3. Step 3: Cross multiply
    56,463.75x = 77,920.11 × 31,318.11
  4. Step 4: Simplify right side
    56,463.75x = 2,440,310,576.19
  5. Step 5: Solve for x
    x = 2,440,310,576.19/56,463.75
  6. Step 6: Final answer
    x = 43,219.07

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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.