Home / 85,939.52-128,912.77-40,937.74

Finding the Fourth Proportional to 85,939.52, 128,912.77 and 40,937.74

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Solution

The fourth proportional to 85,939.52, 128,912.77 and 40,937.74 is: 61,408.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,939.52 : 128,912.77 = 40,937.74 : x
  2. Step 2: Convert to fraction form
    85,939.52/128,912.77 = 40,937.74/x
  3. Step 3: Cross multiply
    85,939.52x = 128,912.77 × 40,937.74
  4. Step 4: Simplify right side
    85,939.52x = 5,277,397,460.94
  5. Step 5: Solve for x
    x = 5,277,397,460.94/85,939.52
  6. Step 6: Final answer
    x = 61,408.28

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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.