Home / 203,623.40-305,435.10-172,130.60

Finding the Fourth Proportional to 203,623.40, 305,435.10 and 172,130.60

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Solution

The fourth proportional to 203,623.40, 305,435.10 and 172,130.60 is: 258,195.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,623.40 : 305,435.10 = 172,130.60 : x
  2. Step 2: Convert to fraction form
    203,623.40/305,435.10 = 172,130.60/x
  3. Step 3: Cross multiply
    203,623.40x = 305,435.10 × 172,130.60
  4. Step 4: Simplify right side
    203,623.40x = 52,574,727,024.06
  5. Step 5: Solve for x
    x = 52,574,727,024.06/203,623.40
  6. Step 6: Final answer
    x = 258,195.90

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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.