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Finding the Fourth Proportional to 55,539, 76,643.82 and 30,388.50

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Solution

The fourth proportional to 55,539, 76,643.82 and 30,388.50 is: 41,936.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,539 : 76,643.82 = 30,388.50 : x
  2. Step 2: Convert to fraction form
    55,539/76,643.82 = 30,388.50/x
  3. Step 3: Cross multiply
    55,539x = 76,643.82 × 30,388.50
  4. Step 4: Simplify right side
    55,539x = 2,329,090,724.07
  5. Step 5: Solve for x
    x = 2,329,090,724.07/55,539
  6. Step 6: Final answer
    x = 41,936.13

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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.