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Finding the Fourth Proportional to 128,364.71, 192,490.83 and 60,915.96

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Solution

The fourth proportional to 128,364.71, 192,490.83 and 60,915.96 is: 91,347.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,364.71 : 192,490.83 = 60,915.96 : x
  2. Step 2: Convert to fraction form
    128,364.71/192,490.83 = 60,915.96/x
  3. Step 3: Cross multiply
    128,364.71x = 192,490.83 × 60,915.96
  4. Step 4: Simplify right side
    128,364.71x = 11,725,763,700.65
  5. Step 5: Solve for x
    x = 11,725,763,700.65/128,364.71
  6. Step 6: Final answer
    x = 91,347.26

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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.