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Finding the Fourth Proportional to 205,068.40, 307,343.40 and 99,660.40

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Solution

The fourth proportional to 205,068.40, 307,343.40 and 99,660.40 is: 149,364.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,068.40 : 307,343.40 = 99,660.40 : x
  2. Step 2: Convert to fraction form
    205,068.40/307,343.40 = 99,660.40/x
  3. Step 3: Cross multiply
    205,068.40x = 307,343.40 × 99,660.40
  4. Step 4: Simplify right side
    205,068.40x = 30,629,966,181.36
  5. Step 5: Solve for x
    x = 30,629,966,181.36/205,068.40
  6. Step 6: Final answer
    x = 149,364.63

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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.