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Finding the Fourth Proportional to 68,103.25, 102,154.91 and 20,718.25

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Solution

The fourth proportional to 68,103.25, 102,154.91 and 20,718.25 is: 31,077.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,103.25 : 102,154.91 = 20,718.25 : x
  2. Step 2: Convert to fraction form
    68,103.25/102,154.91 = 20,718.25/x
  3. Step 3: Cross multiply
    68,103.25x = 102,154.91 × 20,718.25
  4. Step 4: Simplify right side
    68,103.25x = 2,116,470,605.13
  5. Step 5: Solve for x
    x = 2,116,470,605.13/68,103.25
  6. Step 6: Final answer
    x = 31,077.38

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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.