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Finding the Fourth Proportional to 211,449.99, 317,095.90 and 85,047.50

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Solution

The fourth proportional to 211,449.99, 317,095.90 and 85,047.50 is: 127,539.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,449.99 : 317,095.90 = 85,047.50 : x
  2. Step 2: Convert to fraction form
    211,449.99/317,095.90 = 85,047.50/x
  3. Step 3: Cross multiply
    211,449.99x = 317,095.90 × 85,047.50
  4. Step 4: Simplify right side
    211,449.99x = 26,968,214,135.37
  5. Step 5: Solve for x
    x = 26,968,214,135.37/211,449.99
  6. Step 6: Final answer
    x = 127,539.44

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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.