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Finding the Fourth Proportional to 128,045.70, 192,177.90 and 57,077.55

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Solution

The fourth proportional to 128,045.70, 192,177.90 and 57,077.55 is: 85,665.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,045.70 : 192,177.90 = 57,077.55 : x
  2. Step 2: Convert to fraction form
    128,045.70/192,177.90 = 57,077.55/x
  3. Step 3: Cross multiply
    128,045.70x = 192,177.90 × 57,077.55
  4. Step 4: Simplify right side
    128,045.70x = 10,969,043,696.15
  5. Step 5: Solve for x
    x = 10,969,043,696.15/128,045.70
  6. Step 6: Final answer
    x = 85,665.07

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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.