Home / 81,022.19-121,552.88-30,421.67

Finding the Fourth Proportional to 81,022.19, 121,552.88 and 30,421.67

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Solution

The fourth proportional to 81,022.19, 121,552.88 and 30,421.67 is: 45,639.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,022.19 : 121,552.88 = 30,421.67 : x
  2. Step 2: Convert to fraction form
    81,022.19/121,552.88 = 30,421.67/x
  3. Step 3: Cross multiply
    81,022.19x = 121,552.88 × 30,421.67
  4. Step 4: Simplify right side
    81,022.19x = 3,697,840,843.04
  5. Step 5: Solve for x
    x = 3,697,840,843.04/81,022.19
  6. Step 6: Final answer
    x = 45,639.86

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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.