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Finding the Fourth Proportional to 128,807.70, 192,664.80 and 115,576.35

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Solution

The fourth proportional to 128,807.70, 192,664.80 and 115,576.35 is: 172,873.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,807.70 : 192,664.80 = 115,576.35 : x
  2. Step 2: Convert to fraction form
    128,807.70/192,664.80 = 115,576.35/x
  3. Step 3: Cross multiply
    128,807.70x = 192,664.80 × 115,576.35
  4. Step 4: Simplify right side
    128,807.70x = 22,267,494,357.48
  5. Step 5: Solve for x
    x = 22,267,494,357.48/128,807.70
  6. Step 6: Final answer
    x = 172,873.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.