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Finding the Fourth Proportional to 154,216.71, 212,807.39 and 93,778.97

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Solution

The fourth proportional to 154,216.71, 212,807.39 and 93,778.97 is: 129,407.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,216.71 : 212,807.39 = 93,778.97 : x
  2. Step 2: Convert to fraction form
    154,216.71/212,807.39 = 93,778.97/x
  3. Step 3: Cross multiply
    154,216.71x = 212,807.39 × 93,778.97
  4. Step 4: Simplify right side
    154,216.71x = 19,956,856,309.66
  5. Step 5: Solve for x
    x = 19,956,856,309.66/154,216.71
  6. Step 6: Final answer
    x = 129,407.87

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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.