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Finding the Fourth Proportional to 139,898.60, 193,059.46 and 76,236.40

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Solution

The fourth proportional to 139,898.60, 193,059.46 and 76,236.40 is: 105,205.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,898.60 : 193,059.46 = 76,236.40 : x
  2. Step 2: Convert to fraction form
    139,898.60/193,059.46 = 76,236.40/x
  3. Step 3: Cross multiply
    139,898.60x = 193,059.46 × 76,236.40
  4. Step 4: Simplify right side
    139,898.60x = 14,718,158,216.34
  5. Step 5: Solve for x
    x = 14,718,158,216.34/139,898.60
  6. Step 6: Final answer
    x = 105,205.90

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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.