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Finding the Fourth Proportional to 148,020.30, 221,775.30 and 68,972.40

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Solution

The fourth proportional to 148,020.30, 221,775.30 and 68,972.40 is: 103,339.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,020.30 : 221,775.30 = 68,972.40 : x
  2. Step 2: Convert to fraction form
    148,020.30/221,775.30 = 68,972.40/x
  3. Step 3: Cross multiply
    148,020.30x = 221,775.30 × 68,972.40
  4. Step 4: Simplify right side
    148,020.30x = 15,296,374,701.72
  5. Step 5: Solve for x
    x = 15,296,374,701.72/148,020.30
  6. Step 6: Final answer
    x = 103,339.71

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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.