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Finding the Fourth Proportional to 211,078.98, 316,616.04 and 84,751.38

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Solution

The fourth proportional to 211,078.98, 316,616.04 and 84,751.38 is: 127,126.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,078.98 : 316,616.04 = 84,751.38 : x
  2. Step 2: Convert to fraction form
    211,078.98/316,616.04 = 84,751.38/x
  3. Step 3: Cross multiply
    211,078.98x = 316,616.04 × 84,751.38
  4. Step 4: Simplify right side
    211,078.98x = 26,833,646,320.14
  5. Step 5: Solve for x
    x = 26,833,646,320.14/211,078.98
  6. Step 6: Final answer
    x = 127,126.09

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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.