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Finding the Fourth Proportional to 55,871.40, 77,101.40 and 30,378.27

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Solution

The fourth proportional to 55,871.40, 77,101.40 and 30,378.27 is: 41,921.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,871.40 : 77,101.40 = 30,378.27 : x
  2. Step 2: Convert to fraction form
    55,871.40/77,101.40 = 30,378.27/x
  3. Step 3: Cross multiply
    55,871.40x = 77,101.40 × 30,378.27
  4. Step 4: Simplify right side
    55,871.40x = 2,342,206,994.69
  5. Step 5: Solve for x
    x = 2,342,206,994.69/55,871.40
  6. Step 6: Final answer
    x = 41,921.39

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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.