Home / 80,865.69-120,729.93-61,790.49

Finding the Fourth Proportional to 80,865.69, 120,729.93 and 61,790.49

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Solution

The fourth proportional to 80,865.69, 120,729.93 and 61,790.49 is: 92,251.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,865.69 : 120,729.93 = 61,790.49 : x
  2. Step 2: Convert to fraction form
    80,865.69/120,729.93 = 61,790.49/x
  3. Step 3: Cross multiply
    80,865.69x = 120,729.93 × 61,790.49
  4. Step 4: Simplify right side
    80,865.69x = 7,459,961,223.41
  5. Step 5: Solve for x
    x = 7,459,961,223.41/80,865.69
  6. Step 6: Final answer
    x = 92,251.26

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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.