Home / 145,976.40-218,527.20-86,781.60

Finding the Fourth Proportional to 145,976.40, 218,527.20 and 86,781.60

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Solution

The fourth proportional to 145,976.40, 218,527.20 and 86,781.60 is: 129,912.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,976.40 : 218,527.20 = 86,781.60 : x
  2. Step 2: Convert to fraction form
    145,976.40/218,527.20 = 86,781.60/x
  3. Step 3: Cross multiply
    145,976.40x = 218,527.20 × 86,781.60
  4. Step 4: Simplify right side
    145,976.40x = 18,964,140,059.52
  5. Step 5: Solve for x
    x = 18,964,140,059.52/145,976.40
  6. Step 6: Final answer
    x = 129,912.37

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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.