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Finding the Fourth Proportional to 223,646.90, 308,635.17 and 121,672.94

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Solution

The fourth proportional to 223,646.90, 308,635.17 and 121,672.94 is: 167,909.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,646.90 : 308,635.17 = 121,672.94 : x
  2. Step 2: Convert to fraction form
    223,646.90/308,635.17 = 121,672.94/x
  3. Step 3: Cross multiply
    223,646.90x = 308,635.17 × 121,672.94
  4. Step 4: Simplify right side
    223,646.90x = 37,552,548,521.30
  5. Step 5: Solve for x
    x = 37,552,548,521.30/223,646.90
  6. Step 6: Final answer
    x = 167,909.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.