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Finding the Fourth Proportional to 129,337, 178,458.18 and 75,611.48

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Solution

The fourth proportional to 129,337, 178,458.18 and 75,611.48 is: 104,328.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,337 : 178,458.18 = 75,611.48 : x
  2. Step 2: Convert to fraction form
    129,337/178,458.18 = 75,611.48/x
  3. Step 3: Cross multiply
    129,337x = 178,458.18 × 75,611.48
  4. Step 4: Simplify right side
    129,337x = 13,493,487,107.91
  5. Step 5: Solve for x
    x = 13,493,487,107.91/129,337
  6. Step 6: Final answer
    x = 104,328.13

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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.