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Finding the Fourth Proportional to 90,209.72, 124,489.65 and 49,926.26

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Solution

The fourth proportional to 90,209.72, 124,489.65 and 49,926.26 is: 68,898.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,209.72 : 124,489.65 = 49,926.26 : x
  2. Step 2: Convert to fraction form
    90,209.72/124,489.65 = 49,926.26/x
  3. Step 3: Cross multiply
    90,209.72x = 124,489.65 × 49,926.26
  4. Step 4: Simplify right side
    90,209.72x = 6,215,302,633.21
  5. Step 5: Solve for x
    x = 6,215,302,633.21/90,209.72
  6. Step 6: Final answer
    x = 68,898.37

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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.