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Finding the Fourth Proportional to 45,768, 68,643.90 and 20,802.18

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Solution

The fourth proportional to 45,768, 68,643.90 and 20,802.18 is: 31,199.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,768 : 68,643.90 = 20,802.18 : x
  2. Step 2: Convert to fraction form
    45,768/68,643.90 = 20,802.18/x
  3. Step 3: Cross multiply
    45,768x = 68,643.90 × 20,802.18
  4. Step 4: Simplify right side
    45,768x = 1,427,942,763.70
  5. Step 5: Solve for x
    x = 1,427,942,763.70/45,768
  6. Step 6: Final answer
    x = 31,199.59

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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.