Home / 279,986.10-420,416.55-161,888.10

Finding the Fourth Proportional to 279,986.10, 420,416.55 and 161,888.10

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Solution

The fourth proportional to 279,986.10, 420,416.55 and 161,888.10 is: 243,085.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,986.10 : 420,416.55 = 161,888.10 : x
  2. Step 2: Convert to fraction form
    279,986.10/420,416.55 = 161,888.10/x
  3. Step 3: Cross multiply
    279,986.10x = 420,416.55 × 161,888.10
  4. Step 4: Simplify right side
    279,986.10x = 68,060,436,488.06
  5. Step 5: Solve for x
    x = 68,060,436,488.06/279,986.10
  6. Step 6: Final answer
    x = 243,085.05

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1.5x scale

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.