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Finding the Fourth Proportional to 148,762.80, 205,292.43 and 81,694.80

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Solution

The fourth proportional to 148,762.80, 205,292.43 and 81,694.80 is: 112,738.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,762.80 : 205,292.43 = 81,694.80 : x
  2. Step 2: Convert to fraction form
    148,762.80/205,292.43 = 81,694.80/x
  3. Step 3: Cross multiply
    148,762.80x = 205,292.43 × 81,694.80
  4. Step 4: Simplify right side
    148,762.80x = 16,771,324,010.36
  5. Step 5: Solve for x
    x = 16,771,324,010.36/148,762.80
  6. Step 6: Final answer
    x = 112,738.70

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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.