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Finding the Fourth Proportional to 262,601.10, 393,901.65 and 85,113.90

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Solution

The fourth proportional to 262,601.10, 393,901.65 and 85,113.90 is: 127,670.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,601.10 : 393,901.65 = 85,113.90 : x
  2. Step 2: Convert to fraction form
    262,601.10/393,901.65 = 85,113.90/x
  3. Step 3: Cross multiply
    262,601.10x = 393,901.65 × 85,113.90
  4. Step 4: Simplify right side
    262,601.10x = 33,526,505,647.94
  5. Step 5: Solve for x
    x = 33,526,505,647.94/262,601.10
  6. Step 6: Final answer
    x = 127,670.85

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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.