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Finding the Fourth Proportional to 85,646.58, 128,469.87 and 26,480.94

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Solution

The fourth proportional to 85,646.58, 128,469.87 and 26,480.94 is: 39,721.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,646.58 : 128,469.87 = 26,480.94 : x
  2. Step 2: Convert to fraction form
    85,646.58/128,469.87 = 26,480.94/x
  3. Step 3: Cross multiply
    85,646.58x = 128,469.87 × 26,480.94
  4. Step 4: Simplify right side
    85,646.58x = 3,402,002,919.28
  5. Step 5: Solve for x
    x = 3,402,002,919.28/85,646.58
  6. Step 6: Final answer
    x = 39,721.41

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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.