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Finding the Fourth Proportional to 45,720, 68,554.08 and 19,035.20

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Solution

The fourth proportional to 45,720, 68,554.08 and 19,035.20 is: 28,542.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,720 : 68,554.08 = 19,035.20 : x
  2. Step 2: Convert to fraction form
    45,720/68,554.08 = 19,035.20/x
  3. Step 3: Cross multiply
    45,720x = 68,554.08 × 19,035.20
  4. Step 4: Simplify right side
    45,720x = 1,304,940,623.62
  5. Step 5: Solve for x
    x = 1,304,940,623.62/45,720
  6. Step 6: Final answer
    x = 28,542.01

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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.