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Finding the Fourth Proportional to 176,213.28, 243,105.12 and 100,721.28

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Solution

The fourth proportional to 176,213.28, 243,105.12 and 100,721.28 is: 138,955.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    176,213.28 : 243,105.12 = 100,721.28 : x
  2. Step 2: Convert to fraction form
    176,213.28/243,105.12 = 100,721.28/x
  3. Step 3: Cross multiply
    176,213.28x = 243,105.12 × 100,721.28
  4. Step 4: Simplify right side
    176,213.28x = 24,485,858,860.95
  5. Step 5: Solve for x
    x = 24,485,858,860.95/176,213.28
  6. Step 6: Final answer
    x = 138,955.81

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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.