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Finding the Fourth Proportional to 101,187.39, 139,634.98 and 55,864.45

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Solution

The fourth proportional to 101,187.39, 139,634.98 and 55,864.45 is: 77,090.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,187.39 : 139,634.98 = 55,864.45 : x
  2. Step 2: Convert to fraction form
    101,187.39/139,634.98 = 55,864.45/x
  3. Step 3: Cross multiply
    101,187.39x = 139,634.98 × 55,864.45
  4. Step 4: Simplify right side
    101,187.39x = 7,800,631,358.46
  5. Step 5: Solve for x
    x = 7,800,631,358.46/101,187.39
  6. Step 6: Final answer
    x = 77,090.94

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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.