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Finding the Fourth Proportional to 68,723.40, 103,085.10 and 47,728.20

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Solution

The fourth proportional to 68,723.40, 103,085.10 and 47,728.20 is: 71,592.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,723.40 : 103,085.10 = 47,728.20 : x
  2. Step 2: Convert to fraction form
    68,723.40/103,085.10 = 47,728.20/x
  3. Step 3: Cross multiply
    68,723.40x = 103,085.10 × 47,728.20
  4. Step 4: Simplify right side
    68,723.40x = 4,920,066,269.82
  5. Step 5: Solve for x
    x = 4,920,066,269.82/68,723.40
  6. Step 6: Final answer
    x = 71,592.30

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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.