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Finding the Fourth Proportional to 111,424.88, 153,654.36 and 66,738.80

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Solution

The fourth proportional to 111,424.88, 153,654.36 and 66,738.80 is: 92,032.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,424.88 : 153,654.36 = 66,738.80 : x
  2. Step 2: Convert to fraction form
    111,424.88/153,654.36 = 66,738.80/x
  3. Step 3: Cross multiply
    111,424.88x = 153,654.36 × 66,738.80
  4. Step 4: Simplify right side
    111,424.88x = 10,254,707,601.17
  5. Step 5: Solve for x
    x = 10,254,707,601.17/111,424.88
  6. Step 6: Final answer
    x = 92,032.48

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1.5x scale

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.