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Finding the Fourth Proportional to 262,643.40, 394,013.70 and 85,156.20

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Solution

The fourth proportional to 262,643.40, 394,013.70 and 85,156.20 is: 127,750.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,643.40 : 394,013.70 = 85,156.20 : x
  2. Step 2: Convert to fraction form
    262,643.40/394,013.70 = 85,156.20/x
  3. Step 3: Cross multiply
    262,643.40x = 394,013.70 × 85,156.20
  4. Step 4: Simplify right side
    262,643.40x = 33,552,709,439.94
  5. Step 5: Solve for x
    x = 33,552,709,439.94/262,643.40
  6. Step 6: Final answer
    x = 127,750.06

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1.5x scale

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.