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Finding the Fourth Proportional to 85,673.37, 128,369.60 and 60,668.52

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Solution

The fourth proportional to 85,673.37, 128,369.60 and 60,668.52 is: 90,903.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,673.37 : 128,369.60 = 60,668.52 : x
  2. Step 2: Convert to fraction form
    85,673.37/128,369.60 = 60,668.52/x
  3. Step 3: Cross multiply
    85,673.37x = 128,369.60 × 60,668.52
  4. Step 4: Simplify right side
    85,673.37x = 7,787,993,341.65
  5. Step 5: Solve for x
    x = 7,787,993,341.65/85,673.37
  6. Step 6: Final answer
    x = 90,903.32

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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.