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Finding the Fourth Proportional to 77,757, 107,317.62 and 58,861.32

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Solution

The fourth proportional to 77,757, 107,317.62 and 58,861.32 is: 81,238.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,757 : 107,317.62 = 58,861.32 : x
  2. Step 2: Convert to fraction form
    77,757/107,317.62 = 58,861.32/x
  3. Step 3: Cross multiply
    77,757x = 107,317.62 × 58,861.32
  4. Step 4: Simplify right side
    77,757x = 6,316,856,772.46
  5. Step 5: Solve for x
    x = 6,316,856,772.46/77,757
  6. Step 6: Final answer
    x = 81,238.43

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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.