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Finding the Fourth Proportional to 128,578.44, 192,885.98 and 39,838.92

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Solution

The fourth proportional to 128,578.44, 192,885.98 and 39,838.92 is: 59,764.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,578.44 : 192,885.98 = 39,838.92 : x
  2. Step 2: Convert to fraction form
    128,578.44/192,885.98 = 39,838.92/x
  3. Step 3: Cross multiply
    128,578.44x = 192,885.98 × 39,838.92
  4. Step 4: Simplify right side
    128,578.44x = 7,684,369,126.34
  5. Step 5: Solve for x
    x = 7,684,369,126.34/128,578.44
  6. Step 6: Final answer
    x = 59,764.06

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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.