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Finding the Fourth Proportional to 121,788,697.80, 182,683,046.70 and 30,912,286.80

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Solution

The fourth proportional to 121,788,697.80, 182,683,046.70 and 30,912,286.80 is: 46,368,430.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,788,697.80 : 182,683,046.70 = 30,912,286.80 : x
  2. Step 2: Convert to fraction form
    121,788,697.80/182,683,046.70 = 30,912,286.80/x
  3. Step 3: Cross multiply
    121,788,697.80x = 182,683,046.70 × 30,912,286.80
  4. Step 4: Simplify right side
    121,788,697.80x = 5,647,150,733,088,193
  5. Step 5: Solve for x
    x = 5,647,150,733,088,193/121,788,697.80
  6. Step 6: Final answer
    x = 46,368,430.20

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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.