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Finding the Fourth Proportional to 128,773.17, 177,795.03 and 80,448.69

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Solution

The fourth proportional to 128,773.17, 177,795.03 and 80,448.69 is: 111,074.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,773.17 : 177,795.03 = 80,448.69 : x
  2. Step 2: Convert to fraction form
    128,773.17/177,795.03 = 80,448.69/x
  3. Step 3: Cross multiply
    128,773.17x = 177,795.03 × 80,448.69
  4. Step 4: Simplify right side
    128,773.17x = 14,303,377,252.01
  5. Step 5: Solve for x
    x = 14,303,377,252.01/128,773.17
  6. Step 6: Final answer
    x = 111,074.20

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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.