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Finding the Fourth Proportional to 55,112.80, 82,669.20 and 35,429.80

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Solution

The fourth proportional to 55,112.80, 82,669.20 and 35,429.80 is: 53,144.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,112.80 : 82,669.20 = 35,429.80 : x
  2. Step 2: Convert to fraction form
    55,112.80/82,669.20 = 35,429.80/x
  3. Step 3: Cross multiply
    55,112.80x = 82,669.20 × 35,429.80
  4. Step 4: Simplify right side
    55,112.80x = 2,928,953,222.16
  5. Step 5: Solve for x
    x = 2,928,953,222.16/55,112.80
  6. Step 6: Final answer
    x = 53,144.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.