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Finding the Fourth Proportional to 211,208.68, 316,786.56 and 69,042.04

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Solution

The fourth proportional to 211,208.68, 316,786.56 and 69,042.04 is: 103,554.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,208.68 : 316,786.56 = 69,042.04 : x
  2. Step 2: Convert to fraction form
    211,208.68/316,786.56 = 69,042.04/x
  3. Step 3: Cross multiply
    211,208.68x = 316,786.56 × 69,042.04
  4. Step 4: Simplify right side
    211,208.68x = 21,871,590,346.98
  5. Step 5: Solve for x
    x = 21,871,590,346.98/211,208.68
  6. Step 6: Final answer
    x = 103,554.41

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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.