Home / 119,859.20-165,406.40-66,145.60

Finding the Fourth Proportional to 119,859.20, 165,406.40 and 66,145.60

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Solution

The fourth proportional to 119,859.20, 165,406.40 and 66,145.60 is: 91,281.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,859.20 : 165,406.40 = 66,145.60 : x
  2. Step 2: Convert to fraction form
    119,859.20/165,406.40 = 66,145.60/x
  3. Step 3: Cross multiply
    119,859.20x = 165,406.40 × 66,145.60
  4. Step 4: Simplify right side
    119,859.20x = 10,940,905,571.84
  5. Step 5: Solve for x
    x = 10,940,905,571.84/119,859.20
  6. Step 6: Final answer
    x = 91,281.32

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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.