Home / 81,455.15-122,152.75-28,133.56

Finding the Fourth Proportional to 81,455.15, 122,152.75 and 28,133.56

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Solution

The fourth proportional to 81,455.15, 122,152.75 and 28,133.56 is: 42,189.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,455.15 : 122,152.75 = 28,133.56 : x
  2. Step 2: Convert to fraction form
    81,455.15/122,152.75 = 28,133.56/x
  3. Step 3: Cross multiply
    81,455.15x = 122,152.75 × 28,133.56
  4. Step 4: Simplify right side
    81,455.15x = 3,436,591,721.29
  5. Step 5: Solve for x
    x = 3,436,591,721.29/81,455.15
  6. Step 6: Final answer
    x = 42,189.99

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1.5x scale

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.