Home / 130,986.40-196,499.44-66,909.36

Finding the Fourth Proportional to 130,986.40, 196,499.44 and 66,909.36

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Solution

The fourth proportional to 130,986.40, 196,499.44 and 66,909.36 is: 100,374.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,986.40 : 196,499.44 = 66,909.36 : x
  2. Step 2: Convert to fraction form
    130,986.40/196,499.44 = 66,909.36/x
  3. Step 3: Cross multiply
    130,986.40x = 196,499.44 × 66,909.36
  4. Step 4: Simplify right side
    130,986.40x = 13,147,651,770.76
  5. Step 5: Solve for x
    x = 13,147,651,770.76/130,986.40
  6. Step 6: Final answer
    x = 100,374.17

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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.