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Finding the Fourth Proportional to 56,622, 78,143.22 and 31,476.36

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Solution

The fourth proportional to 56,622, 78,143.22 and 31,476.36 is: 43,440.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,622 : 78,143.22 = 31,476.36 : x
  2. Step 2: Convert to fraction form
    56,622/78,143.22 = 31,476.36/x
  3. Step 3: Cross multiply
    56,622x = 78,143.22 × 31,476.36
  4. Step 4: Simplify right side
    56,622x = 2,459,664,124.28
  5. Step 5: Solve for x
    x = 2,459,664,124.28/56,622
  6. Step 6: Final answer
    x = 43,440.08

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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.