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Finding the Fourth Proportional to 100,995.61, 139,367.68 and 55,671.25

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Solution

The fourth proportional to 100,995.61, 139,367.68 and 55,671.25 is: 76,822.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,995.61 : 139,367.68 = 55,671.25 : x
  2. Step 2: Convert to fraction form
    100,995.61/139,367.68 = 55,671.25/x
  3. Step 3: Cross multiply
    100,995.61x = 139,367.68 × 55,671.25
  4. Step 4: Simplify right side
    100,995.61x = 7,758,771,980.01
  5. Step 5: Solve for x
    x = 7,758,771,980.01/100,995.61
  6. Step 6: Final answer
    x = 76,822.87

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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.