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Finding the Fourth Proportional to 211,181.79, 316,739.63 and 69,025.98

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Solution

The fourth proportional to 211,181.79, 316,739.63 and 69,025.98 is: 103,528.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,181.79 : 316,739.63 = 69,025.98 : x
  2. Step 2: Convert to fraction form
    211,181.79/316,739.63 = 69,025.98/x
  3. Step 3: Cross multiply
    211,181.79x = 316,739.63 × 69,025.98
  4. Step 4: Simplify right side
    211,181.79x = 21,863,263,365.59
  5. Step 5: Solve for x
    x = 21,863,263,365.59/211,181.79
  6. Step 6: Final answer
    x = 103,528.17

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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.