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Finding the Fourth Proportional to 66,953.18, 100,443.54 and 21,977.93

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Solution

The fourth proportional to 66,953.18, 100,443.54 and 21,977.93 is: 32,971.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,953.18 : 100,443.54 = 21,977.93 : x
  2. Step 2: Convert to fraction form
    66,953.18/100,443.54 = 21,977.93/x
  3. Step 3: Cross multiply
    66,953.18x = 100,443.54 × 21,977.93
  4. Step 4: Simplify right side
    66,953.18x = 2,207,541,424.60
  5. Step 5: Solve for x
    x = 2,207,541,424.60/66,953.18
  6. Step 6: Final answer
    x = 32,971.42

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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.