Home / 128,110.41-192,073.28-78,178.77

Finding the Fourth Proportional to 128,110.41, 192,073.28 and 78,178.77

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Solution

The fourth proportional to 128,110.41, 192,073.28 and 78,178.77 is: 117,211.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,110.41 : 192,073.28 = 78,178.77 : x
  2. Step 2: Convert to fraction form
    128,110.41/192,073.28 = 78,178.77/x
  3. Step 3: Cross multiply
    128,110.41x = 192,073.28 × 78,178.77
  4. Step 4: Simplify right side
    128,110.41x = 15,016,052,389.37
  5. Step 5: Solve for x
    x = 15,016,052,389.37/128,110.41
  6. Step 6: Final answer
    x = 117,211.80

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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.