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Finding the Fourth Proportional to 128,722.72, 193,014.96 and 45,605.92

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Solution

The fourth proportional to 128,722.72, 193,014.96 and 45,605.92 is: 68,384.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,722.72 : 193,014.96 = 45,605.92 : x
  2. Step 2: Convert to fraction form
    128,722.72/193,014.96 = 45,605.92/x
  3. Step 3: Cross multiply
    128,722.72x = 193,014.96 × 45,605.92
  4. Step 4: Simplify right side
    128,722.72x = 8,802,624,824.56
  5. Step 5: Solve for x
    x = 8,802,624,824.56/128,722.72
  6. Step 6: Final answer
    x = 68,384.39

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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.