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Finding the Fourth Proportional to 100,650.35, 138,894.62 and 55,328.42

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Solution

The fourth proportional to 100,650.35, 138,894.62 and 55,328.42 is: 76,351.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,650.35 : 138,894.62 = 55,328.42 : x
  2. Step 2: Convert to fraction form
    100,650.35/138,894.62 = 55,328.42/x
  3. Step 3: Cross multiply
    100,650.35x = 138,894.62 × 55,328.42
  4. Step 4: Simplify right side
    100,650.35x = 7,684,818,899.99
  5. Step 5: Solve for x
    x = 7,684,818,899.99/100,650.35
  6. Step 6: Final answer
    x = 76,351.64

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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.