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Finding the Fourth Proportional to 128,041.72, 192,063.30 and 49,136.92

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Solution

The fourth proportional to 128,041.72, 192,063.30 and 49,136.92 is: 73,705.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,041.72 : 192,063.30 = 49,136.92 : x
  2. Step 2: Convert to fraction form
    128,041.72/192,063.30 = 49,136.92/x
  3. Step 3: Cross multiply
    128,041.72x = 192,063.30 × 49,136.92
  4. Step 4: Simplify right side
    128,041.72x = 9,437,399,007.04
  5. Step 5: Solve for x
    x = 9,437,399,007.04/128,041.72
  6. Step 6: Final answer
    x = 73,705.66

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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.