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Finding the Fourth Proportional to 243,879.48, 365,782.28 and 66,400.47

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Solution

The fourth proportional to 243,879.48, 365,782.28 and 66,400.47 is: 99,590.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,879.48 : 365,782.28 = 66,400.47 : x
  2. Step 2: Convert to fraction form
    243,879.48/365,782.28 = 66,400.47/x
  3. Step 3: Cross multiply
    243,879.48x = 365,782.28 × 66,400.47
  4. Step 4: Simplify right side
    243,879.48x = 24,288,114,977.67
  5. Step 5: Solve for x
    x = 24,288,114,977.67/243,879.48
  6. Step 6: Final answer
    x = 99,590.65

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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.