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Finding the Fourth Proportional to 67,903.20, 101,813.90 and 30,456.50

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Solution

The fourth proportional to 67,903.20, 101,813.90 and 30,456.50 is: 45,666.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,903.20 : 101,813.90 = 30,456.50 : x
  2. Step 2: Convert to fraction form
    67,903.20/101,813.90 = 30,456.50/x
  3. Step 3: Cross multiply
    67,903.20x = 101,813.90 × 30,456.50
  4. Step 4: Simplify right side
    67,903.20x = 3,100,895,045.35
  5. Step 5: Solve for x
    x = 3,100,895,045.35/67,903.20
  6. Step 6: Final answer
    x = 45,666.41

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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.