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Finding the Fourth Proportional to 128,495.16, 192,660.48 and 61,802.46

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Solution

The fourth proportional to 128,495.16, 192,660.48 and 61,802.46 is: 92,664.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,495.16 : 192,660.48 = 61,802.46 : x
  2. Step 2: Convert to fraction form
    128,495.16/192,660.48 = 61,802.46/x
  3. Step 3: Cross multiply
    128,495.16x = 192,660.48 × 61,802.46
  4. Step 4: Simplify right side
    128,495.16x = 11,906,891,608.78
  5. Step 5: Solve for x
    x = 11,906,891,608.78/128,495.16
  6. Step 6: Final answer
    x = 92,664.13

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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.