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Finding the Fourth Proportional to 211,175.00, 316,695.43 and 68,987.87

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Solution

The fourth proportional to 211,175.00, 316,695.43 and 68,987.87 is: 103,459.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,175.00 : 316,695.43 = 68,987.87 : x
  2. Step 2: Convert to fraction form
    211,175.00/316,695.43 = 68,987.87/x
  3. Step 3: Cross multiply
    211,175.00x = 316,695.43 × 68,987.87
  4. Step 4: Simplify right side
    211,175.00x = 21,848,141,226.02
  5. Step 5: Solve for x
    x = 21,848,141,226.02/211,175.00
  6. Step 6: Final answer
    x = 103,459.89

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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.