Home / 120,462.78-180,573.89-80,515.41

Finding the Fourth Proportional to 120,462.78, 180,573.89 and 80,515.41

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Solution

The fourth proportional to 120,462.78, 180,573.89 and 80,515.41 is: 120,692.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,462.78 : 180,573.89 = 80,515.41 : x
  2. Step 2: Convert to fraction form
    120,462.78/180,573.89 = 80,515.41/x
  3. Step 3: Cross multiply
    120,462.78x = 180,573.89 × 80,515.41
  4. Step 4: Simplify right side
    120,462.78x = 14,538,980,386.07
  5. Step 5: Solve for x
    x = 14,538,980,386.07/120,462.78
  6. Step 6: Final answer
    x = 120,692.72

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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.