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Finding the Fourth Proportional to 139,157.92, 192,056.02 and 77,927.43

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Solution

The fourth proportional to 139,157.92, 192,056.02 and 77,927.43 is: 107,549.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,157.92 : 192,056.02 = 77,927.43 : x
  2. Step 2: Convert to fraction form
    139,157.92/192,056.02 = 77,927.43/x
  3. Step 3: Cross multiply
    139,157.92x = 192,056.02 × 77,927.43
  4. Step 4: Simplify right side
    139,157.92x = 14,966,431,178.72
  5. Step 5: Solve for x
    x = 14,966,431,178.72/139,157.92
  6. Step 6: Final answer
    x = 107,549.97

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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.