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Finding the Fourth Proportional to 129,800.34, 179,137 and 78,801.24

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Solution

The fourth proportional to 129,800.34, 179,137 and 78,801.24 is: 108,753.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,800.34 : 179,137 = 78,801.24 : x
  2. Step 2: Convert to fraction form
    129,800.34/179,137 = 78,801.24/x
  3. Step 3: Cross multiply
    129,800.34x = 179,137 × 78,801.24
  4. Step 4: Simplify right side
    129,800.34x = 14,116,217,729.88
  5. Step 5: Solve for x
    x = 14,116,217,729.88/129,800.34
  6. Step 6: Final answer
    x = 108,753.32

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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.