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Finding the Fourth Proportional to 129,651.84, 178,830.72 and 79,375.68

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Solution

The fourth proportional to 129,651.84, 178,830.72 and 79,375.68 is: 109,484.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,651.84 : 178,830.72 = 79,375.68 : x
  2. Step 2: Convert to fraction form
    129,651.84/178,830.72 = 79,375.68/x
  3. Step 3: Cross multiply
    129,651.84x = 178,830.72 × 79,375.68
  4. Step 4: Simplify right side
    129,651.84x = 14,194,810,004.89
  5. Step 5: Solve for x
    x = 14,194,810,004.89/129,651.84
  6. Step 6: Final answer
    x = 109,484.06

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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.