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Finding the Fourth Proportional to 62,992.90, 86,899.57 and 40,313.71

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Solution

The fourth proportional to 62,992.90, 86,899.57 and 40,313.71 is: 55,613.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,992.90 : 86,899.57 = 40,313.71 : x
  2. Step 2: Convert to fraction form
    62,992.90/86,899.57 = 40,313.71/x
  3. Step 3: Cross multiply
    62,992.90x = 86,899.57 × 40,313.71
  4. Step 4: Simplify right side
    62,992.90x = 3,503,244,064.10
  5. Step 5: Solve for x
    x = 3,503,244,064.10/62,992.90
  6. Step 6: Final answer
    x = 55,613.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.