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Finding the Fourth Proportional to 54,630, 75,389.20 and 30,431.25

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Solution

The fourth proportional to 54,630, 75,389.20 and 30,431.25 is: 41,995.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,630 : 75,389.20 = 30,431.25 : x
  2. Step 2: Convert to fraction form
    54,630/75,389.20 = 30,431.25/x
  3. Step 3: Cross multiply
    54,630x = 75,389.20 × 30,431.25
  4. Step 4: Simplify right side
    54,630x = 2,294,187,516.42
  5. Step 5: Solve for x
    x = 2,294,187,516.42/54,630
  6. Step 6: Final answer
    x = 41,995.01

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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.