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Finding the Fourth Proportional to 101,390.24, 139,919.46 and 56,065.88

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Solution

The fourth proportional to 101,390.24, 139,919.46 and 56,065.88 is: 77,371.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,390.24 : 139,919.46 = 56,065.88 : x
  2. Step 2: Convert to fraction form
    101,390.24/139,919.46 = 56,065.88/x
  3. Step 3: Cross multiply
    101,390.24x = 139,919.46 × 56,065.88
  4. Step 4: Simplify right side
    101,390.24x = 7,844,707,654.02
  5. Step 5: Solve for x
    x = 7,844,707,654.02/101,390.24
  6. Step 6: Final answer
    x = 77,371.43

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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.