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Finding the Fourth Proportional to 85,685.04, 128,550.24 and 35,748.54

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Solution

The fourth proportional to 85,685.04, 128,550.24 and 35,748.54 is: 53,632.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,685.04 : 128,550.24 = 35,748.54 : x
  2. Step 2: Convert to fraction form
    85,685.04/128,550.24 = 35,748.54/x
  3. Step 3: Cross multiply
    85,685.04x = 128,550.24 × 35,748.54
  4. Step 4: Simplify right side
    85,685.04x = 4,595,483,396.65
  5. Step 5: Solve for x
    x = 4,595,483,396.65/85,685.04
  6. Step 6: Final answer
    x = 53,632.27

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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.