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Finding the Fourth Proportional to 101,181.66, 139,640.13 and 75,643.80

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Solution

The fourth proportional to 101,181.66, 139,640.13 and 75,643.80 is: 104,395.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,181.66 : 139,640.13 = 75,643.80 : x
  2. Step 2: Convert to fraction form
    101,181.66/139,640.13 = 75,643.80/x
  3. Step 3: Cross multiply
    101,181.66x = 139,640.13 × 75,643.80
  4. Step 4: Simplify right side
    101,181.66x = 10,562,910,065.69
  5. Step 5: Solve for x
    x = 10,562,910,065.69/101,181.66
  6. Step 6: Final answer
    x = 104,395.50

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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.