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Finding the Fourth Proportional to 209,369.64, 288,927.95 and 113,876.31

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Solution

The fourth proportional to 209,369.64, 288,927.95 and 113,876.31 is: 157,148.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,369.64 : 288,927.95 = 113,876.31 : x
  2. Step 2: Convert to fraction form
    209,369.64/288,927.95 = 113,876.31/x
  3. Step 3: Cross multiply
    209,369.64x = 288,927.95 × 113,876.31
  4. Step 4: Simplify right side
    209,369.64x = 32,902,049,315.96
  5. Step 5: Solve for x
    x = 32,902,049,315.96/209,369.64
  6. Step 6: Final answer
    x = 157,148.14

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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.