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Finding the Fourth Proportional to 129,651.76, 178,919.42 and 70,035.76

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Solution

The fourth proportional to 129,651.76, 178,919.42 and 70,035.76 is: 96,649.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,651.76 : 178,919.42 = 70,035.76 : x
  2. Step 2: Convert to fraction form
    129,651.76/178,919.42 = 70,035.76/x
  3. Step 3: Cross multiply
    129,651.76x = 178,919.42 × 70,035.76
  4. Step 4: Simplify right side
    129,651.76x = 12,530,757,558.46
  5. Step 5: Solve for x
    x = 12,530,757,558.46/129,651.76
  6. Step 6: Final answer
    x = 96,649.34

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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.