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Finding the Fourth Proportional to 67,901.60, 101,929.20 and 40,215.20

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Solution

The fourth proportional to 67,901.60, 101,929.20 and 40,215.20 is: 60,368.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,901.60 : 101,929.20 = 40,215.20 : x
  2. Step 2: Convert to fraction form
    67,901.60/101,929.20 = 40,215.20/x
  3. Step 3: Cross multiply
    67,901.60x = 101,929.20 × 40,215.20
  4. Step 4: Simplify right side
    67,901.60x = 4,099,103,163.84
  5. Step 5: Solve for x
    x = 4,099,103,163.84/67,901.60
  6. Step 6: Final answer
    x = 60,368.29

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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.