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Finding the Fourth Proportional to 211,804.04, 317,767.55 and 85,379.04

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Solution

The fourth proportional to 211,804.04, 317,767.55 and 85,379.04 is: 128,093.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,804.04 : 317,767.55 = 85,379.04 : x
  2. Step 2: Convert to fraction form
    211,804.04/317,767.55 = 85,379.04/x
  3. Step 3: Cross multiply
    211,804.04x = 317,767.55 × 85,379.04
  4. Step 4: Simplify right side
    211,804.04x = 27,130,688,362.15
  5. Step 5: Solve for x
    x = 27,130,688,362.15/211,804.04
  6. Step 6: Final answer
    x = 128,093.35

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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.