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Finding the Fourth Proportional to 211,206.68, 316,783.58 and 69,040.04

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Solution

The fourth proportional to 211,206.68, 316,783.58 and 69,040.04 is: 103,551.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,206.68 : 316,783.58 = 69,040.04 : x
  2. Step 2: Convert to fraction form
    211,206.68/316,783.58 = 69,040.04/x
  3. Step 3: Cross multiply
    211,206.68x = 316,783.58 × 69,040.04
  4. Step 4: Simplify right side
    211,206.68x = 21,870,751,034.54
  5. Step 5: Solve for x
    x = 21,870,751,034.54/211,206.68
  6. Step 6: Final answer
    x = 103,551.42

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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.