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Finding the Fourth Proportional to 191,013.76, 286,652.26 and 66,354.76

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Solution

The fourth proportional to 191,013.76, 286,652.26 and 66,354.76 is: 99,577.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,013.76 : 286,652.26 = 66,354.76 : x
  2. Step 2: Convert to fraction form
    191,013.76/286,652.26 = 66,354.76/x
  3. Step 3: Cross multiply
    191,013.76x = 286,652.26 × 66,354.76
  4. Step 4: Simplify right side
    191,013.76x = 19,020,741,915.76
  5. Step 5: Solve for x
    x = 19,020,741,915.76/191,013.76
  6. Step 6: Final answer
    x = 99,577.86

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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.