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Finding the Fourth Proportional to 128,136.71, 192,223.44 and 39,397.66

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Solution

The fourth proportional to 128,136.71, 192,223.44 and 39,397.66 is: 59,102.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,136.71 : 192,223.44 = 39,397.66 : x
  2. Step 2: Convert to fraction form
    128,136.71/192,223.44 = 39,397.66/x
  3. Step 3: Cross multiply
    128,136.71x = 192,223.44 × 39,397.66
  4. Step 4: Simplify right side
    128,136.71x = 7,573,153,733.15
  5. Step 5: Solve for x
    x = 7,573,153,733.15/128,136.71
  6. Step 6: Final answer
    x = 59,102.14

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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.