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Finding the Fourth Proportional to 85,802.68, 128,704.78 and 35,229.52

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Solution

The fourth proportional to 85,802.68, 128,704.78 and 35,229.52 is: 52,844.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,802.68 : 128,704.78 = 35,229.52 : x
  2. Step 2: Convert to fraction form
    85,802.68/128,704.78 = 35,229.52/x
  3. Step 3: Cross multiply
    85,802.68x = 128,704.78 × 35,229.52
  4. Step 4: Simplify right side
    85,802.68x = 4,534,207,709.18
  5. Step 5: Solve for x
    x = 4,534,207,709.18/85,802.68
  6. Step 6: Final answer
    x = 52,844.59

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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.