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Finding the Fourth Proportional to 128,480.46, 177,307.83 and 71,892.24

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Solution

The fourth proportional to 128,480.46, 177,307.83 and 71,892.24 is: 99,213.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,480.46 : 177,307.83 = 71,892.24 : x
  2. Step 2: Convert to fraction form
    128,480.46/177,307.83 = 71,892.24/x
  3. Step 3: Cross multiply
    128,480.46x = 177,307.83 × 71,892.24
  4. Step 4: Simplify right side
    128,480.46x = 12,747,057,068.24
  5. Step 5: Solve for x
    x = 12,747,057,068.24/128,480.46
  6. Step 6: Final answer
    x = 99,213.97

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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.