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Finding the Fourth Proportional to 45,981.90, 68,959.89 and 19,715.22

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Solution

The fourth proportional to 45,981.90, 68,959.89 and 19,715.22 is: 29,567.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,981.90 : 68,959.89 = 19,715.22 : x
  2. Step 2: Convert to fraction form
    45,981.90/68,959.89 = 19,715.22/x
  3. Step 3: Cross multiply
    45,981.90x = 68,959.89 × 19,715.22
  4. Step 4: Simplify right side
    45,981.90x = 1,359,559,402.53
  5. Step 5: Solve for x
    x = 1,359,559,402.53/45,981.90
  6. Step 6: Final answer
    x = 29,567.27

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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.