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Finding the Fourth Proportional to 75,811.50, 104,617.71 and 41,820.12

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Solution

The fourth proportional to 75,811.50, 104,617.71 and 41,820.12 is: 57,710.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,811.50 : 104,617.71 = 41,820.12 : x
  2. Step 2: Convert to fraction form
    75,811.50/104,617.71 = 41,820.12/x
  3. Step 3: Cross multiply
    75,811.50x = 104,617.71 × 41,820.12
  4. Step 4: Simplify right side
    75,811.50x = 4,375,125,186.33
  5. Step 5: Solve for x
    x = 4,375,125,186.33/75,811.50
  6. Step 6: Final answer
    x = 57,710.57

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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.