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Finding the Fourth Proportional to 99,940.40, 149,737.80 and 47,236.40

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Solution

The fourth proportional to 99,940.40, 149,737.80 and 47,236.40 is: 70,772.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,940.40 : 149,737.80 = 47,236.40 : x
  2. Step 2: Convert to fraction form
    99,940.40/149,737.80 = 47,236.40/x
  3. Step 3: Cross multiply
    99,940.40x = 149,737.80 × 47,236.40
  4. Step 4: Simplify right side
    99,940.40x = 7,073,074,615.92
  5. Step 5: Solve for x
    x = 7,073,074,615.92/99,940.40
  6. Step 6: Final answer
    x = 70,772.93

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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.