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Finding the Fourth Proportional to 112,122, 154,739.28 and 61,821

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Solution

The fourth proportional to 112,122, 154,739.28 and 61,821 is: 85,319.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,122 : 154,739.28 = 61,821 : x
  2. Step 2: Convert to fraction form
    112,122/154,739.28 = 61,821/x
  3. Step 3: Cross multiply
    112,122x = 154,739.28 × 61,821
  4. Step 4: Simplify right side
    112,122x = 9,566,137,028.88
  5. Step 5: Solve for x
    x = 9,566,137,028.88/112,122
  6. Step 6: Final answer
    x = 85,319.00

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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.