Home / 211,590.89-317,441.00-78,509.10

Finding the Fourth Proportional to 211,590.89, 317,441.00 and 78,509.10

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Solution

The fourth proportional to 211,590.89, 317,441.00 and 78,509.10 is: 117,783.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,590.89 : 317,441.00 = 78,509.10 : x
  2. Step 2: Convert to fraction form
    211,590.89/317,441.00 = 78,509.10/x
  3. Step 3: Cross multiply
    211,590.89x = 317,441.00 × 78,509.10
  4. Step 4: Simplify right side
    211,590.89x = 24,922,007,409.37
  5. Step 5: Solve for x
    x = 24,922,007,409.37/211,590.89
  6. Step 6: Final answer
    x = 117,783.94

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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.