Home / 81,735.75-121,888.35-80,988.39

Finding the Fourth Proportional to 81,735.75, 121,888.35 and 80,988.39

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Solution

The fourth proportional to 81,735.75, 121,888.35 and 80,988.39 is: 120,773.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,735.75 : 121,888.35 = 80,988.39 : x
  2. Step 2: Convert to fraction form
    81,735.75/121,888.35 = 80,988.39/x
  3. Step 3: Cross multiply
    81,735.75x = 121,888.35 × 80,988.39
  4. Step 4: Simplify right side
    81,735.75x = 9,871,541,226.26
  5. Step 5: Solve for x
    x = 9,871,541,226.26/81,735.75
  6. Step 6: Final answer
    x = 120,773.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.