Home / 154,321.20-212,916.60-90,622.80

Finding the Fourth Proportional to 154,321.20, 212,916.60 and 90,622.80

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Solution

The fourth proportional to 154,321.20, 212,916.60 and 90,622.80 is: 125,032.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,321.20 : 212,916.60 = 90,622.80 : x
  2. Step 2: Convert to fraction form
    154,321.20/212,916.60 = 90,622.80/x
  3. Step 3: Cross multiply
    154,321.20x = 212,916.60 × 90,622.80
  4. Step 4: Simplify right side
    154,321.20x = 19,295,098,458.48
  5. Step 5: Solve for x
    x = 19,295,098,458.48/154,321.20
  6. Step 6: Final answer
    x = 125,032.07

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1.5x scale

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.