Home / 128,383.84-177,169.76-71,795.40

Finding the Fourth Proportional to 128,383.84, 177,169.76 and 71,795.40

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Solution

The fourth proportional to 128,383.84, 177,169.76 and 71,795.40 is: 99,077.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,383.84 : 177,169.76 = 71,795.40 : x
  2. Step 2: Convert to fraction form
    128,383.84/177,169.76 = 71,795.40/x
  3. Step 3: Cross multiply
    128,383.84x = 177,169.76 × 71,795.40
  4. Step 4: Simplify right side
    128,383.84x = 12,719,973,787.10
  5. Step 5: Solve for x
    x = 12,719,973,787.10/128,383.84
  6. Step 6: Final answer
    x = 99,077.69

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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.