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Finding the Fourth Proportional to 138,874.16, 191,503 and 118,797.48

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Solution

The fourth proportional to 138,874.16, 191,503 and 118,797.48 is: 163,817.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,874.16 : 191,503 = 118,797.48 : x
  2. Step 2: Convert to fraction form
    138,874.16/191,503 = 118,797.48/x
  3. Step 3: Cross multiply
    138,874.16x = 191,503 × 118,797.48
  4. Step 4: Simplify right side
    138,874.16x = 22,750,073,812.44
  5. Step 5: Solve for x
    x = 22,750,073,812.44/138,874.16
  6. Step 6: Final answer
    x = 163,817.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.