Home / 81,982.40-122,973.60-71,614.40

Finding the Fourth Proportional to 81,982.40, 122,973.60 and 71,614.40

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Solution

The fourth proportional to 81,982.40, 122,973.60 and 71,614.40 is: 107,421.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,982.40 : 122,973.60 = 71,614.40 : x
  2. Step 2: Convert to fraction form
    81,982.40/122,973.60 = 71,614.40/x
  3. Step 3: Cross multiply
    81,982.40x = 122,973.60 × 71,614.40
  4. Step 4: Simplify right side
    81,982.40x = 8,806,680,579.84
  5. Step 5: Solve for x
    x = 8,806,680,579.84/81,982.40
  6. Step 6: Final answer
    x = 107,421.60

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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.