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Finding the Fourth Proportional to 75,118.78, 103,664.16 and 41,127.58

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Solution

The fourth proportional to 75,118.78, 103,664.16 and 41,127.58 is: 56,756.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,118.78 : 103,664.16 = 41,127.58 : x
  2. Step 2: Convert to fraction form
    75,118.78/103,664.16 = 41,127.58/x
  3. Step 3: Cross multiply
    75,118.78x = 103,664.16 × 41,127.58
  4. Step 4: Simplify right side
    75,118.78x = 4,263,456,033.53
  5. Step 5: Solve for x
    x = 4,263,456,033.53/75,118.78
  6. Step 6: Final answer
    x = 56,756.19

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1.5x scale

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.