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Finding the Fourth Proportional to 30,319,338.60, 45,479,007.90 and 12,114,531.90

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Solution

The fourth proportional to 30,319,338.60, 45,479,007.90 and 12,114,531.90 is: 18,171,797.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,319,338.60 : 45,479,007.90 = 12,114,531.90 : x
  2. Step 2: Convert to fraction form
    30,319,338.60/45,479,007.90 = 12,114,531.90/x
  3. Step 3: Cross multiply
    30,319,338.60x = 45,479,007.90 × 12,114,531.90
  4. Step 4: Simplify right side
    30,319,338.60x = 550,956,891,984,902
  5. Step 5: Solve for x
    x = 550,956,891,984,902/30,319,338.60
  6. Step 6: Final answer
    x = 18,171,797.85

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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.