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Finding the Fourth Proportional to 80,860.58, 120,658.43 and 72,455.08

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Solution

The fourth proportional to 80,860.58, 120,658.43 and 72,455.08 is: 108,115.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,860.58 : 120,658.43 = 72,455.08 : x
  2. Step 2: Convert to fraction form
    80,860.58/120,658.43 = 72,455.08/x
  3. Step 3: Cross multiply
    80,860.58x = 120,658.43 × 72,455.08
  4. Step 4: Simplify right side
    80,860.58x = 8,742,316,198.32
  5. Step 5: Solve for x
    x = 8,742,316,198.32/80,860.58
  6. Step 6: Final answer
    x = 108,115.92

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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.