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Finding the Fourth Proportional to 56,388.68, 77,815.17 and 30,893.79

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Solution

The fourth proportional to 56,388.68, 77,815.17 and 30,893.79 is: 42,632.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,388.68 : 77,815.17 = 30,893.79 : x
  2. Step 2: Convert to fraction form
    56,388.68/77,815.17 = 30,893.79/x
  3. Step 3: Cross multiply
    56,388.68x = 77,815.17 × 30,893.79
  4. Step 4: Simplify right side
    56,388.68x = 2,404,005,520.79
  5. Step 5: Solve for x
    x = 2,404,005,520.79/56,388.68
  6. Step 6: Final answer
    x = 42,632.77

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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.