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Finding the Fourth Proportional to 128,153.80, 192,250.68 and 61,581.52

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Solution

The fourth proportional to 128,153.80, 192,250.68 and 61,581.52 is: 92,381.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,153.80 : 192,250.68 = 61,581.52 : x
  2. Step 2: Convert to fraction form
    128,153.80/192,250.68 = 61,581.52/x
  3. Step 3: Cross multiply
    128,153.80x = 192,250.68 × 61,581.52
  4. Step 4: Simplify right side
    128,153.80x = 11,839,089,095.43
  5. Step 5: Solve for x
    x = 11,839,089,095.43/128,153.80
  6. Step 6: Final answer
    x = 92,381.88

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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.