Home / 80,890.34-121,351.91-30,972.06

Finding the Fourth Proportional to 80,890.34, 121,351.91 and 30,972.06

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Solution

The fourth proportional to 80,890.34, 121,351.91 and 30,972.06 is: 46,464.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,890.34 : 121,351.91 = 30,972.06 : x
  2. Step 2: Convert to fraction form
    80,890.34/121,351.91 = 30,972.06/x
  3. Step 3: Cross multiply
    80,890.34x = 121,351.91 × 30,972.06
  4. Step 4: Simplify right side
    80,890.34x = 3,758,518,482.77
  5. Step 5: Solve for x
    x = 3,758,518,482.77/80,890.34
  6. Step 6: Final answer
    x = 46,464.37

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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.