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Finding the Fourth Proportional to 123,640.70, 185,380.05 and 48,715.70

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Solution

The fourth proportional to 123,640.70, 185,380.05 and 48,715.70 is: 73,041.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,640.70 : 185,380.05 = 48,715.70 : x
  2. Step 2: Convert to fraction form
    123,640.70/185,380.05 = 48,715.70/x
  3. Step 3: Cross multiply
    123,640.70x = 185,380.05 × 48,715.70
  4. Step 4: Simplify right side
    123,640.70x = 9,030,918,901.79
  5. Step 5: Solve for x
    x = 9,030,918,901.79/123,640.70
  6. Step 6: Final answer
    x = 73,041.64

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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.