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Finding the Fourth Proportional to 211,319.58, 316,912.50 and 69,132

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Solution

The fourth proportional to 211,319.58, 316,912.50 and 69,132 is: 103,676.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,319.58 : 316,912.50 = 69,132 : x
  2. Step 2: Convert to fraction form
    211,319.58/316,912.50 = 69,132/x
  3. Step 3: Cross multiply
    211,319.58x = 316,912.50 × 69,132
  4. Step 4: Simplify right side
    211,319.58x = 21,908,794,950
  5. Step 5: Solve for x
    x = 21,908,794,950/211,319.58
  6. Step 6: Final answer
    x = 103,676.12

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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.