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Finding the Fourth Proportional to 90,221.05, 124,501.89 and 49,934.89

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Solution

The fourth proportional to 90,221.05, 124,501.89 and 49,934.89 is: 68,908.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,221.05 : 124,501.89 = 49,934.89 : x
  2. Step 2: Convert to fraction form
    90,221.05/124,501.89 = 49,934.89/x
  3. Step 3: Cross multiply
    90,221.05x = 124,501.89 × 49,934.89
  4. Step 4: Simplify right side
    90,221.05x = 6,216,988,181.94
  5. Step 5: Solve for x
    x = 6,216,988,181.94/90,221.05
  6. Step 6: Final answer
    x = 68,908.40

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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.