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Finding the Fourth Proportional to 100,796.39, 139,041.16 and 63,005.03

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Solution

The fourth proportional to 100,796.39, 139,041.16 and 63,005.03 is: 86,910.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,796.39 : 139,041.16 = 63,005.03 : x
  2. Step 2: Convert to fraction form
    100,796.39/139,041.16 = 63,005.03/x
  3. Step 3: Cross multiply
    100,796.39x = 139,041.16 × 63,005.03
  4. Step 4: Simplify right side
    100,796.39x = 8,760,292,125.72
  5. Step 5: Solve for x
    x = 8,760,292,125.72/100,796.39
  6. Step 6: Final answer
    x = 86,910.77

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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.