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Finding the Fourth Proportional to 134,000.08, 200,969.42 and 79,980

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Solution

The fourth proportional to 134,000.08, 200,969.42 and 79,980 is: 119,951.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,000.08 : 200,969.42 = 79,980 : x
  2. Step 2: Convert to fraction form
    134,000.08/200,969.42 = 79,980/x
  3. Step 3: Cross multiply
    134,000.08x = 200,969.42 × 79,980
  4. Step 4: Simplify right side
    134,000.08x = 16,073,534,411.55
  5. Step 5: Solve for x
    x = 16,073,534,411.55/134,000.08
  6. Step 6: Final answer
    x = 119,951.68

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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.