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Finding the Fourth Proportional to 42,734,462.70, 64,101,694.05 and 12,443,313.90

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Solution

The fourth proportional to 42,734,462.70, 64,101,694.05 and 12,443,313.90 is: 18,664,970.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,734,462.70 : 64,101,694.05 = 12,443,313.90 : x
  2. Step 2: Convert to fraction form
    42,734,462.70/64,101,694.05 = 12,443,313.90/x
  3. Step 3: Cross multiply
    42,734,462.70x = 64,101,694.05 × 12,443,313.90
  4. Step 4: Simplify right side
    42,734,462.70x = 797,637,500,585,912.25
  5. Step 5: Solve for x
    x = 797,637,500,585,912.25/42,734,462.70
  6. Step 6: Final answer
    x = 18,664,970.85

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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.