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Finding the Fourth Proportional to 101,020.58, 139,408.29 and 55,699.28

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Solution

The fourth proportional to 101,020.58, 139,408.29 and 55,699.28 is: 76,864.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,020.58 : 139,408.29 = 55,699.28 : x
  2. Step 2: Convert to fraction form
    101,020.58/139,408.29 = 55,699.28/x
  3. Step 3: Cross multiply
    101,020.58x = 139,408.29 × 55,699.28
  4. Step 4: Simplify right side
    101,020.58x = 7,764,941,557.92
  5. Step 5: Solve for x
    x = 7,764,941,557.92/101,020.58
  6. Step 6: Final answer
    x = 76,864.94

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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.