Home / 80,390.90-120,518.30-30,443.46

Finding the Fourth Proportional to 80,390.90, 120,518.30 and 30,443.46

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Solution

The fourth proportional to 80,390.90, 120,518.30 and 30,443.46 is: 45,639.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,390.90 : 120,518.30 = 30,443.46 : x
  2. Step 2: Convert to fraction form
    80,390.90/120,518.30 = 30,443.46/x
  3. Step 3: Cross multiply
    80,390.90x = 120,518.30 × 30,443.46
  4. Step 4: Simplify right side
    80,390.90x = 3,668,994,045.32
  5. Step 5: Solve for x
    x = 3,668,994,045.32/80,390.90
  6. Step 6: Final answer
    x = 45,639.42

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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.