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Finding the Fourth Proportional to 119,637.05, 165,091.70 and 65,919.06

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Solution

The fourth proportional to 119,637.05, 165,091.70 and 65,919.06 is: 90,964.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,637.05 : 165,091.70 = 65,919.06 : x
  2. Step 2: Convert to fraction form
    119,637.05/165,091.70 = 65,919.06/x
  3. Step 3: Cross multiply
    119,637.05x = 165,091.70 × 65,919.06
  4. Step 4: Simplify right side
    119,637.05x = 10,882,689,348.21
  5. Step 5: Solve for x
    x = 10,882,689,348.21/119,637.05
  6. Step 6: Final answer
    x = 90,964.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.