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Finding the Fourth Proportional to 68,607.16, 102,840.90 and 31,193.80

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Solution

The fourth proportional to 68,607.16, 102,840.90 and 31,193.80 is: 46,758.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,607.16 : 102,840.90 = 31,193.80 : x
  2. Step 2: Convert to fraction form
    68,607.16/102,840.90 = 31,193.80/x
  3. Step 3: Cross multiply
    68,607.16x = 102,840.90 × 31,193.80
  4. Step 4: Simplify right side
    68,607.16x = 3,207,998,466.42
  5. Step 5: Solve for x
    x = 3,207,998,466.42/68,607.16
  6. Step 6: Final answer
    x = 46,758.95

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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.