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Finding the Fourth Proportional to 119,735.60, 165,235.80 and 66,019.70

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Solution

The fourth proportional to 119,735.60, 165,235.80 and 66,019.70 is: 91,107.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,735.60 : 165,235.80 = 66,019.70 : x
  2. Step 2: Convert to fraction form
    119,735.60/165,235.80 = 66,019.70/x
  3. Step 3: Cross multiply
    119,735.60x = 165,235.80 × 66,019.70
  4. Step 4: Simplify right side
    119,735.60x = 10,908,817,945.26
  5. Step 5: Solve for x
    x = 10,908,817,945.26/119,735.60
  6. Step 6: Final answer
    x = 91,107.56

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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.