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Finding the Fourth Proportional to 85,752.70, 128,629.11 and 35,805.55

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Solution

The fourth proportional to 85,752.70, 128,629.11 and 35,805.55 is: 53,708.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,752.70 : 128,629.11 = 35,805.55 : x
  2. Step 2: Convert to fraction form
    85,752.70/128,629.11 = 35,805.55/x
  3. Step 3: Cross multiply
    85,752.70x = 128,629.11 × 35,805.55
  4. Step 4: Simplify right side
    85,752.70x = 4,605,636,029.56
  5. Step 5: Solve for x
    x = 4,605,636,029.56/85,752.70
  6. Step 6: Final answer
    x = 53,708.35

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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.