Home / 306,621.12-423,137.04-172,485.12

Finding the Fourth Proportional to 306,621.12, 423,137.04 and 172,485.12

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Solution

The fourth proportional to 306,621.12, 423,137.04 and 172,485.12 is: 238,029.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,621.12 : 423,137.04 = 172,485.12 : x
  2. Step 2: Convert to fraction form
    306,621.12/423,137.04 = 172,485.12/x
  3. Step 3: Cross multiply
    306,621.12x = 423,137.04 × 172,485.12
  4. Step 4: Simplify right side
    306,621.12x = 72,984,843,120.84
  5. Step 5: Solve for x
    x = 72,984,843,120.84/306,621.12
  6. Step 6: Final answer
    x = 238,029.41

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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.