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Finding the Fourth Proportional to 154,057.40, 231,086.10 and 71,113.40

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Solution

The fourth proportional to 154,057.40, 231,086.10 and 71,113.40 is: 106,670.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,057.40 : 231,086.10 = 71,113.40 : x
  2. Step 2: Convert to fraction form
    154,057.40/231,086.10 = 71,113.40/x
  3. Step 3: Cross multiply
    154,057.40x = 231,086.10 × 71,113.40
  4. Step 4: Simplify right side
    154,057.40x = 16,433,318,263.74
  5. Step 5: Solve for x
    x = 16,433,318,263.74/154,057.40
  6. Step 6: Final answer
    x = 106,670.10

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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.