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Finding the Fourth Proportional to 144,963.28, 217,090.56 and 85,622.80

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Solution

The fourth proportional to 144,963.28, 217,090.56 and 85,622.80 is: 128,224.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,963.28 : 217,090.56 = 85,622.80 : x
  2. Step 2: Convert to fraction form
    144,963.28/217,090.56 = 85,622.80/x
  3. Step 3: Cross multiply
    144,963.28x = 217,090.56 × 85,622.80
  4. Step 4: Simplify right side
    144,963.28x = 18,587,901,600.77
  5. Step 5: Solve for x
    x = 18,587,901,600.77/144,963.28
  6. Step 6: Final answer
    x = 128,224.90

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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.