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Finding the Fourth Proportional to 129,063.60, 178,108.20 and 74,611.44

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Solution

The fourth proportional to 129,063.60, 178,108.20 and 74,611.44 is: 102,964.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,063.60 : 178,108.20 = 74,611.44 : x
  2. Step 2: Convert to fraction form
    129,063.60/178,108.20 = 74,611.44/x
  3. Step 3: Cross multiply
    129,063.60x = 178,108.20 × 74,611.44
  4. Step 4: Simplify right side
    129,063.60x = 13,288,909,277.81
  5. Step 5: Solve for x
    x = 13,288,909,277.81/129,063.60
  6. Step 6: Final answer
    x = 102,964.04

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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.