Home / 128,966.18-177,680.57-99,794.24

Finding the Fourth Proportional to 128,966.18, 177,680.57 and 99,794.24

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Solution

The fourth proportional to 128,966.18, 177,680.57 and 99,794.24 is: 137,489.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,966.18 : 177,680.57 = 99,794.24 : x
  2. Step 2: Convert to fraction form
    128,966.18/177,680.57 = 99,794.24/x
  3. Step 3: Cross multiply
    128,966.18x = 177,680.57 × 99,794.24
  4. Step 4: Simplify right side
    128,966.18x = 17,731,496,058.54
  5. Step 5: Solve for x
    x = 17,731,496,058.54/128,966.18
  6. Step 6: Final answer
    x = 137,489.51

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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.