Home / 91,289.20-136,933.80-42,137.20

Finding the Fourth Proportional to 91,289.20, 136,933.80 and 42,137.20

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Solution

The fourth proportional to 91,289.20, 136,933.80 and 42,137.20 is: 63,205.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,289.20 : 136,933.80 = 42,137.20 : x
  2. Step 2: Convert to fraction form
    91,289.20/136,933.80 = 42,137.20/x
  3. Step 3: Cross multiply
    91,289.20x = 136,933.80 × 42,137.20
  4. Step 4: Simplify right side
    91,289.20x = 5,770,006,917.36
  5. Step 5: Solve for x
    x = 5,770,006,917.36/91,289.20
  6. Step 6: Final answer
    x = 63,205.80

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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.