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Finding the Fourth Proportional to 30,081.62, 45,073.11 and 21,300.77

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Solution

The fourth proportional to 30,081.62, 45,073.11 and 21,300.77 is: 31,916.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,081.62 : 45,073.11 = 21,300.77 : x
  2. Step 2: Convert to fraction form
    30,081.62/45,073.11 = 21,300.77/x
  3. Step 3: Cross multiply
    30,081.62x = 45,073.11 × 21,300.77
  4. Step 4: Simplify right side
    30,081.62x = 960,091,949.29
  5. Step 5: Solve for x
    x = 960,091,949.29/30,081.62
  6. Step 6: Final answer
    x = 31,916.23

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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.