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Finding the Fourth Proportional to 90,613, 125,045.94 and 50,869

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Solution

The fourth proportional to 90,613, 125,045.94 and 50,869 is: 70,199.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,613 : 125,045.94 = 50,869 : x
  2. Step 2: Convert to fraction form
    90,613/125,045.94 = 50,869/x
  3. Step 3: Cross multiply
    90,613x = 125,045.94 × 50,869
  4. Step 4: Simplify right side
    90,613x = 6,360,961,921.86
  5. Step 5: Solve for x
    x = 6,360,961,921.86/90,613
  6. Step 6: Final answer
    x = 70,199.22

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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.