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Finding the Fourth Proportional to 127,915.63, 191,873.91 and 39,168.78

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Solution

The fourth proportional to 127,915.63, 191,873.91 and 39,168.78 is: 58,753.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,915.63 : 191,873.91 = 39,168.78 : x
  2. Step 2: Convert to fraction form
    127,915.63/191,873.91 = 39,168.78/x
  3. Step 3: Cross multiply
    127,915.63x = 191,873.91 × 39,168.78
  4. Step 4: Simplify right side
    127,915.63x = 7,515,466,009.16
  5. Step 5: Solve for x
    x = 7,515,466,009.16/127,915.63
  6. Step 6: Final answer
    x = 58,753.30

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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.