Home / 81,928.40-122,820.60-55,547.60

Finding the Fourth Proportional to 81,928.40, 122,820.60 and 55,547.60

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Solution

The fourth proportional to 81,928.40, 122,820.60 and 55,547.60 is: 83,272.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,928.40 : 122,820.60 = 55,547.60 : x
  2. Step 2: Convert to fraction form
    81,928.40/122,820.60 = 55,547.60/x
  3. Step 3: Cross multiply
    81,928.40x = 122,820.60 × 55,547.60
  4. Step 4: Simplify right side
    81,928.40x = 6,822,389,560.56
  5. Step 5: Solve for x
    x = 6,822,389,560.56/81,928.40
  6. Step 6: Final answer
    x = 83,272.58

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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.