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Finding the Fourth Proportional to 231,639.60, 347,459.40 and 81,878.70

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Solution

The fourth proportional to 231,639.60, 347,459.40 and 81,878.70 is: 122,818.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,639.60 : 347,459.40 = 81,878.70 : x
  2. Step 2: Convert to fraction form
    231,639.60/347,459.40 = 81,878.70/x
  3. Step 3: Cross multiply
    231,639.60x = 347,459.40 × 81,878.70
  4. Step 4: Simplify right side
    231,639.60x = 28,449,523,974.78
  5. Step 5: Solve for x
    x = 28,449,523,974.78/231,639.60
  6. Step 6: Final answer
    x = 122,818.05

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1.5x scale

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.