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Finding the Fourth Proportional to 90,398.99, 124,742.21 and 50,109.32

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Solution

The fourth proportional to 90,398.99, 124,742.21 and 50,109.32 is: 69,146.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,398.99 : 124,742.21 = 50,109.32 : x
  2. Step 2: Convert to fraction form
    90,398.99/124,742.21 = 50,109.32/x
  3. Step 3: Cross multiply
    90,398.99x = 124,742.21 × 50,109.32
  4. Step 4: Simplify right side
    90,398.99x = 6,250,747,379.71
  5. Step 5: Solve for x
    x = 6,250,747,379.71/90,398.99
  6. Step 6: Final answer
    x = 69,146.21

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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.