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Finding the Fourth Proportional to 209,215.48, 313,820.48 and 51,445.30

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Solution

The fourth proportional to 209,215.48, 313,820.48 and 51,445.30 is: 77,167.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,215.48 : 313,820.48 = 51,445.30 : x
  2. Step 2: Convert to fraction form
    209,215.48/313,820.48 = 51,445.30/x
  3. Step 3: Cross multiply
    209,215.48x = 313,820.48 × 51,445.30
  4. Step 4: Simplify right side
    209,215.48x = 16,144,586,913.42
  5. Step 5: Solve for x
    x = 16,144,586,913.42/209,215.48
  6. Step 6: Final answer
    x = 77,167.27

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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.