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Finding the Fourth Proportional to 211,165.40, 316,715.09 and 69,009.54

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Solution

The fourth proportional to 211,165.40, 316,715.09 and 69,009.54 is: 103,503.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,165.40 : 316,715.09 = 69,009.54 : x
  2. Step 2: Convert to fraction form
    211,165.40/316,715.09 = 69,009.54/x
  3. Step 3: Cross multiply
    211,165.40x = 316,715.09 × 69,009.54
  4. Step 4: Simplify right side
    211,165.40x = 21,856,362,326.91
  5. Step 5: Solve for x
    x = 21,856,362,326.91/211,165.40
  6. Step 6: Final answer
    x = 103,503.52

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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.