Home / 68,861.20-103,316.10-66,431.20

Finding the Fourth Proportional to 68,861.20, 103,316.10 and 66,431.20

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Solution

The fourth proportional to 68,861.20, 103,316.10 and 66,431.20 is: 99,670.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,861.20 : 103,316.10 = 66,431.20 : x
  2. Step 2: Convert to fraction form
    68,861.20/103,316.10 = 66,431.20/x
  3. Step 3: Cross multiply
    68,861.20x = 103,316.10 × 66,431.20
  4. Step 4: Simplify right side
    68,861.20x = 6,863,412,502.32
  5. Step 5: Solve for x
    x = 6,863,412,502.32/68,861.20
  6. Step 6: Final answer
    x = 99,670.24

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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.