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Finding the Fourth Proportional to 146,768.60, 220,152.90 and 76,631.60

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Solution

The fourth proportional to 146,768.60, 220,152.90 and 76,631.60 is: 114,947.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,768.60 : 220,152.90 = 76,631.60 : x
  2. Step 2: Convert to fraction form
    146,768.60/220,152.90 = 76,631.60/x
  3. Step 3: Cross multiply
    146,768.60x = 220,152.90 × 76,631.60
  4. Step 4: Simplify right side
    146,768.60x = 16,870,668,971.64
  5. Step 5: Solve for x
    x = 16,870,668,971.64/146,768.60
  6. Step 6: Final answer
    x = 114,947.40

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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.