Home / 120,621.21-166,453.29-72,866.25

Finding the Fourth Proportional to 120,621.21, 166,453.29 and 72,866.25

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Solution

The fourth proportional to 120,621.21, 166,453.29 and 72,866.25 is: 100,553.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,621.21 : 166,453.29 = 72,866.25 : x
  2. Step 2: Convert to fraction form
    120,621.21/166,453.29 = 72,866.25/x
  3. Step 3: Cross multiply
    120,621.21x = 166,453.29 × 72,866.25
  4. Step 4: Simplify right side
    120,621.21x = 12,128,827,042.46
  5. Step 5: Solve for x
    x = 12,128,827,042.46/120,621.21
  6. Step 6: Final answer
    x = 100,553.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.