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Finding the Fourth Proportional to 82,860.60, 124,290.90 and 80,556.60

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Solution

The fourth proportional to 82,860.60, 124,290.90 and 80,556.60 is: 120,834.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,860.60 : 124,290.90 = 80,556.60 : x
  2. Step 2: Convert to fraction form
    82,860.60/124,290.90 = 80,556.60/x
  3. Step 3: Cross multiply
    82,860.60x = 124,290.90 × 80,556.60
  4. Step 4: Simplify right side
    82,860.60x = 10,012,452,314.94
  5. Step 5: Solve for x
    x = 10,012,452,314.94/82,860.60
  6. Step 6: Final answer
    x = 120,834.90

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1.5x scale

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.