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Finding the Fourth Proportional to 66,377.36, 99,550.32 and 18,991

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Solution

The fourth proportional to 66,377.36, 99,550.32 and 18,991 is: 28,482.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,377.36 : 99,550.32 = 18,991 : x
  2. Step 2: Convert to fraction form
    66,377.36/99,550.32 = 18,991/x
  3. Step 3: Cross multiply
    66,377.36x = 99,550.32 × 18,991
  4. Step 4: Simplify right side
    66,377.36x = 1,890,560,127.12
  5. Step 5: Solve for x
    x = 1,890,560,127.12/66,377.36
  6. Step 6: Final answer
    x = 28,482.00

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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.