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Finding the Fourth Proportional to 109,943.40, 164,843.10 and 43,343.40

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Solution

The fourth proportional to 109,943.40, 164,843.10 and 43,343.40 is: 64,986.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,943.40 : 164,843.10 = 43,343.40 : x
  2. Step 2: Convert to fraction form
    109,943.40/164,843.10 = 43,343.40/x
  3. Step 3: Cross multiply
    109,943.40x = 164,843.10 × 43,343.40
  4. Step 4: Simplify right side
    109,943.40x = 7,144,860,420.54
  5. Step 5: Solve for x
    x = 7,144,860,420.54/109,943.40
  6. Step 6: Final answer
    x = 64,986.72

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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.