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Finding the Fourth Proportional to 139,226.94, 192,127.36 and 78,800.89

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Solution

The fourth proportional to 139,226.94, 192,127.36 and 78,800.89 is: 108,741.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,226.94 : 192,127.36 = 78,800.89 : x
  2. Step 2: Convert to fraction form
    139,226.94/192,127.36 = 78,800.89/x
  3. Step 3: Cross multiply
    139,226.94x = 192,127.36 × 78,800.89
  4. Step 4: Simplify right side
    139,226.94x = 15,139,806,961.35
  5. Step 5: Solve for x
    x = 15,139,806,961.35/139,226.94
  6. Step 6: Final answer
    x = 108,741.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.