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Finding the Fourth Proportional to 128,825.84, 177,776.07 and 71,464.88

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Solution

The fourth proportional to 128,825.84, 177,776.07 and 71,464.88 is: 98,619.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,825.84 : 177,776.07 = 71,464.88 : x
  2. Step 2: Convert to fraction form
    128,825.84/177,776.07 = 71,464.88/x
  3. Step 3: Cross multiply
    128,825.84x = 177,776.07 × 71,464.88
  4. Step 4: Simplify right side
    128,825.84x = 12,704,745,685.87
  5. Step 5: Solve for x
    x = 12,704,745,685.87/128,825.84
  6. Step 6: Final answer
    x = 98,619.54

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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.