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Finding the Fourth Proportional to 66,893.95, 100,340.93 and 20,146.83

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Solution

The fourth proportional to 66,893.95, 100,340.93 and 20,146.83 is: 30,220.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,893.95 : 100,340.93 = 20,146.83 : x
  2. Step 2: Convert to fraction form
    66,893.95/100,340.93 = 20,146.83/x
  3. Step 3: Cross multiply
    66,893.95x = 100,340.93 × 20,146.83
  4. Step 4: Simplify right side
    66,893.95x = 2,021,551,219.51
  5. Step 5: Solve for x
    x = 2,021,551,219.51/66,893.95
  6. Step 6: Final answer
    x = 30,220.24

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1.5x scale

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.