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Finding the Fourth Proportional to 85,975.80, 129,010.77 and 33,387.36

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Solution

The fourth proportional to 85,975.80, 129,010.77 and 33,387.36 is: 50,099.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,975.80 : 129,010.77 = 33,387.36 : x
  2. Step 2: Convert to fraction form
    85,975.80/129,010.77 = 33,387.36/x
  3. Step 3: Cross multiply
    85,975.80x = 129,010.77 × 33,387.36
  4. Step 4: Simplify right side
    85,975.80x = 4,307,329,021.87
  5. Step 5: Solve for x
    x = 4,307,329,021.87/85,975.80
  6. Step 6: Final answer
    x = 50,099.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.