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Finding the Fourth Proportional to 101,703.28, 140,350.14 and 56,991.28

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Solution

The fourth proportional to 101,703.28, 140,350.14 and 56,991.28 is: 78,647.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,703.28 : 140,350.14 = 56,991.28 : x
  2. Step 2: Convert to fraction form
    101,703.28/140,350.14 = 56,991.28/x
  3. Step 3: Cross multiply
    101,703.28x = 140,350.14 × 56,991.28
  4. Step 4: Simplify right side
    101,703.28x = 7,998,734,126.78
  5. Step 5: Solve for x
    x = 7,998,734,126.78/101,703.28
  6. Step 6: Final answer
    x = 78,647.75

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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.