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Finding the Fourth Proportional to 129,127.67, 193,749.93 and 65,915.15

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Solution

The fourth proportional to 129,127.67, 193,749.93 and 65,915.15 is: 98,902.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,127.67 : 193,749.93 = 65,915.15 : x
  2. Step 2: Convert to fraction form
    129,127.67/193,749.93 = 65,915.15/x
  3. Step 3: Cross multiply
    129,127.67x = 193,749.93 × 65,915.15
  4. Step 4: Simplify right side
    129,127.67x = 12,771,055,698.44
  5. Step 5: Solve for x
    x = 12,771,055,698.44/129,127.67
  6. Step 6: Final answer
    x = 98,902.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.