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Finding the Fourth Proportional to 39,840.72, 59,863.08 and 30,072

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Solution

The fourth proportional to 39,840.72, 59,863.08 and 30,072 is: 45,184.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,840.72 : 59,863.08 = 30,072 : x
  2. Step 2: Convert to fraction form
    39,840.72/59,863.08 = 30,072/x
  3. Step 3: Cross multiply
    39,840.72x = 59,863.08 × 30,072
  4. Step 4: Simplify right side
    39,840.72x = 1,800,202,541.76
  5. Step 5: Solve for x
    x = 1,800,202,541.76/39,840.72
  6. Step 6: Final answer
    x = 45,184.99

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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.