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Finding the Fourth Proportional to 257,958.60, 386,937.90 and 70,969.80

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Solution

The fourth proportional to 257,958.60, 386,937.90 and 70,969.80 is: 106,454.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,958.60 : 386,937.90 = 70,969.80 : x
  2. Step 2: Convert to fraction form
    257,958.60/386,937.90 = 70,969.80/x
  3. Step 3: Cross multiply
    257,958.60x = 386,937.90 × 70,969.80
  4. Step 4: Simplify right side
    257,958.60x = 27,460,905,375.42
  5. Step 5: Solve for x
    x = 27,460,905,375.42/257,958.60
  6. Step 6: Final answer
    x = 106,454.70

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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.