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Finding the Fourth Proportional to 128,777.80, 192,777.90 and 113,225.80

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Solution

The fourth proportional to 128,777.80, 192,777.90 and 113,225.80 is: 169,496.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,777.80 : 192,777.90 = 113,225.80 : x
  2. Step 2: Convert to fraction form
    128,777.80/192,777.90 = 113,225.80/x
  3. Step 3: Cross multiply
    128,777.80x = 192,777.90 × 113,225.80
  4. Step 4: Simplify right side
    128,777.80x = 21,827,431,949.82
  5. Step 5: Solve for x
    x = 21,827,431,949.82/128,777.80
  6. Step 6: Final answer
    x = 169,496.85

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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.