Home / 80,639.25-120,354.71-79,308.94

Finding the Fourth Proportional to 80,639.25, 120,354.71 and 79,308.94

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Solution

The fourth proportional to 80,639.25, 120,354.71 and 79,308.94 is: 118,369.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,639.25 : 120,354.71 = 79,308.94 : x
  2. Step 2: Convert to fraction form
    80,639.25/120,354.71 = 79,308.94/x
  3. Step 3: Cross multiply
    80,639.25x = 120,354.71 × 79,308.94
  4. Step 4: Simplify right side
    80,639.25x = 9,545,203,940.71
  5. Step 5: Solve for x
    x = 9,545,203,940.71/80,639.25
  6. Step 6: Final answer
    x = 118,369.21

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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.