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Finding the Fourth Proportional to 30,332,912.40, 45,499,368.60 and 20,129,245.20

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Solution

The fourth proportional to 30,332,912.40, 45,499,368.60 and 20,129,245.20 is: 30,193,867.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,332,912.40 : 45,499,368.60 = 20,129,245.20 : x
  2. Step 2: Convert to fraction form
    30,332,912.40/45,499,368.60 = 20,129,245.20/x
  3. Step 3: Cross multiply
    30,332,912.40x = 45,499,368.60 × 20,129,245.20
  4. Step 4: Simplify right side
    30,332,912.40x = 915,867,946,994,580.75
  5. Step 5: Solve for x
    x = 915,867,946,994,580.75/30,332,912.40
  6. Step 6: Final answer
    x = 30,193,867.80

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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.