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Finding the Fourth Proportional to 125,916.40, 188,874.60 and 112,138.30

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Solution

The fourth proportional to 125,916.40, 188,874.60 and 112,138.30 is: 168,207.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,916.40 : 188,874.60 = 112,138.30 : x
  2. Step 2: Convert to fraction form
    125,916.40/188,874.60 = 112,138.30/x
  3. Step 3: Cross multiply
    125,916.40x = 188,874.60 × 112,138.30
  4. Step 4: Simplify right side
    125,916.40x = 21,180,076,557.18
  5. Step 5: Solve for x
    x = 21,180,076,557.18/125,916.40
  6. Step 6: Final answer
    x = 168,207.45

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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.