Home / 85,972.88-128,917.85-36,039.57

Finding the Fourth Proportional to 85,972.88, 128,917.85 and 36,039.57

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Solution

The fourth proportional to 85,972.88, 128,917.85 and 36,039.57 is: 54,041.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,972.88 : 128,917.85 = 36,039.57 : x
  2. Step 2: Convert to fraction form
    85,972.88/128,917.85 = 36,039.57/x
  3. Step 3: Cross multiply
    85,972.88x = 128,917.85 × 36,039.57
  4. Step 4: Simplify right side
    85,972.88x = 4,646,143,699.13
  5. Step 5: Solve for x
    x = 4,646,143,699.13/85,972.88
  6. Step 6: Final answer
    x = 54,041.97

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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.