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Finding the Fourth Proportional to 213,085.80, 319,628.70 and 119,579.40

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Solution

The fourth proportional to 213,085.80, 319,628.70 and 119,579.40 is: 179,369.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,085.80 : 319,628.70 = 119,579.40 : x
  2. Step 2: Convert to fraction form
    213,085.80/319,628.70 = 119,579.40/x
  3. Step 3: Cross multiply
    213,085.80x = 319,628.70 × 119,579.40
  4. Step 4: Simplify right side
    213,085.80x = 38,221,008,168.78
  5. Step 5: Solve for x
    x = 38,221,008,168.78/213,085.80
  6. Step 6: Final answer
    x = 179,369.10

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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.