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Finding the Fourth Proportional to 111,268, 153,549.84 and 66,556

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Solution

The fourth proportional to 111,268, 153,549.84 and 66,556 is: 91,847.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,268 : 153,549.84 = 66,556 : x
  2. Step 2: Convert to fraction form
    111,268/153,549.84 = 66,556/x
  3. Step 3: Cross multiply
    111,268x = 153,549.84 × 66,556
  4. Step 4: Simplify right side
    111,268x = 10,219,663,151.04
  5. Step 5: Solve for x
    x = 10,219,663,151.04/111,268
  6. Step 6: Final answer
    x = 91,847.28

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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.