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Finding the Fourth Proportional to 81,068.78, 111,879.40 and 45,259.08

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Solution

The fourth proportional to 81,068.78, 111,879.40 and 45,259.08 is: 62,460.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,068.78 : 111,879.40 = 45,259.08 : x
  2. Step 2: Convert to fraction form
    81,068.78/111,879.40 = 45,259.08/x
  3. Step 3: Cross multiply
    81,068.78x = 111,879.40 × 45,259.08
  4. Step 4: Simplify right side
    81,068.78x = 5,063,558,714.95
  5. Step 5: Solve for x
    x = 5,063,558,714.95/81,068.78
  6. Step 6: Final answer
    x = 62,460.03

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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.