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Finding the Fourth Proportional to 149,052.88, 205,690.88 and 81,068.32

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Solution

The fourth proportional to 149,052.88, 205,690.88 and 81,068.32 is: 111,873.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,052.88 : 205,690.88 = 81,068.32 : x
  2. Step 2: Convert to fraction form
    149,052.88/205,690.88 = 81,068.32/x
  3. Step 3: Cross multiply
    149,052.88x = 205,690.88 × 81,068.32
  4. Step 4: Simplify right side
    149,052.88x = 16,675,014,080.92
  5. Step 5: Solve for x
    x = 16,675,014,080.92/149,052.88
  6. Step 6: Final answer
    x = 111,873.14

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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.