Home / 128,341.62-177,134.31-77,363.46

Finding the Fourth Proportional to 128,341.62, 177,134.31 and 77,363.46

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Solution

The fourth proportional to 128,341.62, 177,134.31 and 77,363.46 is: 106,775.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,341.62 : 177,134.31 = 77,363.46 : x
  2. Step 2: Convert to fraction form
    128,341.62/177,134.31 = 77,363.46/x
  3. Step 3: Cross multiply
    128,341.62x = 177,134.31 × 77,363.46
  4. Step 4: Simplify right side
    128,341.62x = 13,703,723,106.31
  5. Step 5: Solve for x
    x = 13,703,723,106.31/128,341.62
  6. Step 6: Final answer
    x = 106,775.36

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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.