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Finding the Fourth Proportional to 211,798.65, 317,759.48 and 85,373.65

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Solution

The fourth proportional to 211,798.65, 317,759.48 and 85,373.65 is: 128,085.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,798.65 : 317,759.48 = 85,373.65 : x
  2. Step 2: Convert to fraction form
    211,798.65/317,759.48 = 85,373.65/x
  3. Step 3: Cross multiply
    211,798.65x = 317,759.48 × 85,373.65
  4. Step 4: Simplify right side
    211,798.65x = 27,128,285,372.90
  5. Step 5: Solve for x
    x = 27,128,285,372.90/211,798.65
  6. Step 6: Final answer
    x = 128,085.26

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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.