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Finding the Fourth Proportional to 119,639.45, 165,109.80 and 65,924.46

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Solution

The fourth proportional to 119,639.45, 165,109.80 and 65,924.46 is: 90,979.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,639.45 : 165,109.80 = 65,924.46 : x
  2. Step 2: Convert to fraction form
    119,639.45/165,109.80 = 65,924.46/x
  3. Step 3: Cross multiply
    119,639.45x = 165,109.80 × 65,924.46
  4. Step 4: Simplify right side
    119,639.45x = 10,884,774,405.71
  5. Step 5: Solve for x
    x = 10,884,774,405.71/119,639.45
  6. Step 6: Final answer
    x = 90,979.81

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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.