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Finding the Fourth Proportional to 70,728.10, 97,605.06 and 38,899.02

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Solution

The fourth proportional to 70,728.10, 97,605.06 and 38,899.02 is: 53,680.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,728.10 : 97,605.06 = 38,899.02 : x
  2. Step 2: Convert to fraction form
    70,728.10/97,605.06 = 38,899.02/x
  3. Step 3: Cross multiply
    70,728.10x = 97,605.06 × 38,899.02
  4. Step 4: Simplify right side
    70,728.10x = 3,796,741,181.04
  5. Step 5: Solve for x
    x = 3,796,741,181.04/70,728.10
  6. Step 6: Final answer
    x = 53,680.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.