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Finding the Fourth Proportional to 82,765.80, 124,148.70 and 76,860.90

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Solution

The fourth proportional to 82,765.80, 124,148.70 and 76,860.90 is: 115,291.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,765.80 : 124,148.70 = 76,860.90 : x
  2. Step 2: Convert to fraction form
    82,765.80/124,148.70 = 76,860.90/x
  3. Step 3: Cross multiply
    82,765.80x = 124,148.70 × 76,860.90
  4. Step 4: Simplify right side
    82,765.80x = 9,542,180,815.83
  5. Step 5: Solve for x
    x = 9,542,180,815.83/82,765.80
  6. Step 6: Final answer
    x = 115,291.35

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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.