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Finding the Fourth Proportional to 124,428.60, 186,730.38 and 112,531.32

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Solution

The fourth proportional to 124,428.60, 186,730.38 and 112,531.32 is: 168,876.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,428.60 : 186,730.38 = 112,531.32 : x
  2. Step 2: Convert to fraction form
    124,428.60/186,730.38 = 112,531.32/x
  3. Step 3: Cross multiply
    124,428.60x = 186,730.38 × 112,531.32
  4. Step 4: Simplify right side
    124,428.60x = 21,013,016,145.50
  5. Step 5: Solve for x
    x = 21,013,016,145.50/124,428.60
  6. Step 6: Final answer
    x = 168,876.10

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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.