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Finding the Fourth Proportional to 100,797.90, 139,101.22 and 55,479.16

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Solution

The fourth proportional to 100,797.90, 139,101.22 and 55,479.16 is: 76,561.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,797.90 : 139,101.22 = 55,479.16 : x
  2. Step 2: Convert to fraction form
    100,797.90/139,101.22 = 55,479.16/x
  3. Step 3: Cross multiply
    100,797.90x = 139,101.22 × 55,479.16
  4. Step 4: Simplify right side
    100,797.90x = 7,717,218,840.58
  5. Step 5: Solve for x
    x = 7,717,218,840.58/100,797.90
  6. Step 6: Final answer
    x = 76,561.31

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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.