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Finding the Fourth Proportional to 128,473.60, 177,293.70 and 71,884.84

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Solution

The fourth proportional to 128,473.60, 177,293.70 and 71,884.84 is: 99,201.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,473.60 : 177,293.70 = 71,884.84 : x
  2. Step 2: Convert to fraction form
    128,473.60/177,293.70 = 71,884.84/x
  3. Step 3: Cross multiply
    128,473.60x = 177,293.70 × 71,884.84
  4. Step 4: Simplify right side
    128,473.60x = 12,744,729,257.51
  5. Step 5: Solve for x
    x = 12,744,729,257.51/128,473.60
  6. Step 6: Final answer
    x = 99,201.15

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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.