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Finding the Fourth Proportional to 345,721, 518,668.98 and 96,403

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Solution

The fourth proportional to 345,721, 518,668.98 and 96,403 is: 144,628.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,721 : 518,668.98 = 96,403 : x
  2. Step 2: Convert to fraction form
    345,721/518,668.98 = 96,403/x
  3. Step 3: Cross multiply
    345,721x = 518,668.98 × 96,403
  4. Step 4: Simplify right side
    345,721x = 50,001,245,678.94
  5. Step 5: Solve for x
    x = 50,001,245,678.94/345,721
  6. Step 6: Final answer
    x = 144,628.89

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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.