Home / 81,436.12-122,112.90-28,838.20

Finding the Fourth Proportional to 81,436.12, 122,112.90 and 28,838.20

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Solution

The fourth proportional to 81,436.12, 122,112.90 and 28,838.20 is: 43,242.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,436.12 : 122,112.90 = 28,838.20 : x
  2. Step 2: Convert to fraction form
    81,436.12/122,112.90 = 28,838.20/x
  3. Step 3: Cross multiply
    81,436.12x = 122,112.90 × 28,838.20
  4. Step 4: Simplify right side
    81,436.12x = 3,521,516,232.78
  5. Step 5: Solve for x
    x = 3,521,516,232.78/81,436.12
  6. Step 6: Final answer
    x = 43,242.68

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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.