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Finding the Fourth Proportional to 112,758.88, 169,146.28 and 45,290.96

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Solution

The fourth proportional to 112,758.88, 169,146.28 and 45,290.96 is: 67,939.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,758.88 : 169,146.28 = 45,290.96 : x
  2. Step 2: Convert to fraction form
    112,758.88/169,146.28 = 45,290.96/x
  3. Step 3: Cross multiply
    112,758.88x = 169,146.28 × 45,290.96
  4. Step 4: Simplify right side
    112,758.88x = 7,660,797,401.63
  5. Step 5: Solve for x
    x = 7,660,797,401.63/112,758.88
  6. Step 6: Final answer
    x = 67,939.64

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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.