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Finding the Fourth Proportional to 92,411.10, 137,948.14 and 81,201.06

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Solution

The fourth proportional to 92,411.10, 137,948.14 and 81,201.06 is: 121,214.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,411.10 : 137,948.14 = 81,201.06 : x
  2. Step 2: Convert to fraction form
    92,411.10/137,948.14 = 81,201.06/x
  3. Step 3: Cross multiply
    92,411.10x = 137,948.14 × 81,201.06
  4. Step 4: Simplify right side
    92,411.10x = 11,201,535,193.03
  5. Step 5: Solve for x
    x = 11,201,535,193.03/92,411.10
  6. Step 6: Final answer
    x = 121,214.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.