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Finding the Fourth Proportional to 223,651.90, 308,642.07 and 121,677.94

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Solution

The fourth proportional to 223,651.90, 308,642.07 and 121,677.94 is: 167,916.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,651.90 : 308,642.07 = 121,677.94 : x
  2. Step 2: Convert to fraction form
    223,651.90/308,642.07 = 121,677.94/x
  3. Step 3: Cross multiply
    223,651.90x = 308,642.07 × 121,677.94
  4. Step 4: Simplify right side
    223,651.90x = 37,554,931,274.94
  5. Step 5: Solve for x
    x = 37,554,931,274.94/223,651.90
  6. Step 6: Final answer
    x = 167,916.89

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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.