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Finding the Fourth Proportional to 101,186.61, 139,633.86 and 55,863.63

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Solution

The fourth proportional to 101,186.61, 139,633.86 and 55,863.63 is: 77,089.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,186.61 : 139,633.86 = 55,863.63 : x
  2. Step 2: Convert to fraction form
    101,186.61/139,633.86 = 55,863.63/x
  3. Step 3: Cross multiply
    101,186.61x = 139,633.86 × 55,863.63
  4. Step 4: Simplify right side
    101,186.61x = 7,800,454,290.51
  5. Step 5: Solve for x
    x = 7,800,454,290.51/101,186.61
  6. Step 6: Final answer
    x = 77,089.79

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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.