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Finding the Fourth Proportional to 191,418.78, 287,128.16 and 51,173.76

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Solution

The fourth proportional to 191,418.78, 287,128.16 and 51,173.76 is: 76,760.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,418.78 : 287,128.16 = 51,173.76 : x
  2. Step 2: Convert to fraction form
    191,418.78/287,128.16 = 51,173.76/x
  3. Step 3: Cross multiply
    191,418.78x = 287,128.16 × 51,173.76
  4. Step 4: Simplify right side
    191,418.78x = 14,693,427,549.08
  5. Step 5: Solve for x
    x = 14,693,427,549.08/191,418.78
  6. Step 6: Final answer
    x = 76,760.64

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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.