Home / 279,165.10-418,618.05-121,312.30

Finding the Fourth Proportional to 279,165.10, 418,618.05 and 121,312.30

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Solution

The fourth proportional to 279,165.10, 418,618.05 and 121,312.30 is: 181,912.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,165.10 : 418,618.05 = 121,312.30 : x
  2. Step 2: Convert to fraction form
    279,165.10/418,618.05 = 121,312.30/x
  3. Step 3: Cross multiply
    279,165.10x = 418,618.05 × 121,312.30
  4. Step 4: Simplify right side
    279,165.10x = 50,783,518,467.02
  5. Step 5: Solve for x
    x = 50,783,518,467.02/279,165.10
  6. Step 6: Final answer
    x = 181,912.13

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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.