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Finding the Fourth Proportional to 191,118, 286,677 and 66,459

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Solution

The fourth proportional to 191,118, 286,677 and 66,459 is: 99,688.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,118 : 286,677 = 66,459 : x
  2. Step 2: Convert to fraction form
    191,118/286,677 = 66,459/x
  3. Step 3: Cross multiply
    191,118x = 286,677 × 66,459
  4. Step 4: Simplify right side
    191,118x = 19,052,266,743
  5. Step 5: Solve for x
    x = 19,052,266,743/191,118
  6. Step 6: Final answer
    x = 99,688.50

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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.