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Finding the Fourth Proportional to 211,238.90, 316,791.39 and 69,051.98

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Solution

The fourth proportional to 211,238.90, 316,791.39 and 69,051.98 is: 103,556.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,238.90 : 316,791.39 = 69,051.98 : x
  2. Step 2: Convert to fraction form
    211,238.90/316,791.39 = 69,051.98/x
  3. Step 3: Cross multiply
    211,238.90x = 316,791.39 × 69,051.98
  4. Step 4: Simplify right side
    211,238.90x = 21,875,072,726.45
  5. Step 5: Solve for x
    x = 21,875,072,726.45/211,238.90
  6. Step 6: Final answer
    x = 103,556.08

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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.