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Finding the Fourth Proportional to 139,855.34, 193,000.63 and 79,425.98

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Solution

The fourth proportional to 139,855.34, 193,000.63 and 79,425.98 is: 109,608.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,855.34 : 193,000.63 = 79,425.98 : x
  2. Step 2: Convert to fraction form
    139,855.34/193,000.63 = 79,425.98/x
  3. Step 3: Cross multiply
    139,855.34x = 193,000.63 × 79,425.98
  4. Step 4: Simplify right side
    139,855.34x = 15,329,263,887.48
  5. Step 5: Solve for x
    x = 15,329,263,887.48/139,855.34
  6. Step 6: Final answer
    x = 109,608.00

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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.