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Finding the Fourth Proportional to 245,911.92, 339,354.96 and 138,492.48

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Solution

The fourth proportional to 245,911.92, 339,354.96 and 138,492.48 is: 191,117.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,911.92 : 339,354.96 = 138,492.48 : x
  2. Step 2: Convert to fraction form
    245,911.92/339,354.96 = 138,492.48/x
  3. Step 3: Cross multiply
    245,911.92x = 339,354.96 × 138,492.48
  4. Step 4: Simplify right side
    245,911.92x = 46,998,110,010.70
  5. Step 5: Solve for x
    x = 46,998,110,010.70/245,911.92
  6. Step 6: Final answer
    x = 191,117.66

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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.