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Finding the Fourth Proportional to 117,813.40, 176,720.10 and 80,488.60

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Solution

The fourth proportional to 117,813.40, 176,720.10 and 80,488.60 is: 120,732.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,813.40 : 176,720.10 = 80,488.60 : x
  2. Step 2: Convert to fraction form
    117,813.40/176,720.10 = 80,488.60/x
  3. Step 3: Cross multiply
    117,813.40x = 176,720.10 × 80,488.60
  4. Step 4: Simplify right side
    117,813.40x = 14,223,953,440.86
  5. Step 5: Solve for x
    x = 14,223,953,440.86/117,813.40
  6. Step 6: Final answer
    x = 120,732.90

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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.