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Finding the Fourth Proportional to 66,490, 100,193.76 and 60,249.76

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Solution

The fourth proportional to 66,490, 100,193.76 and 60,249.76 is: 90,790.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,490 : 100,193.76 = 60,249.76 : x
  2. Step 2: Convert to fraction form
    66,490/100,193.76 = 60,249.76/x
  3. Step 3: Cross multiply
    66,490x = 100,193.76 × 60,249.76
  4. Step 4: Simplify right side
    66,490x = 6,036,649,993.50
  5. Step 5: Solve for x
    x = 6,036,649,993.50/66,490
  6. Step 6: Final answer
    x = 90,790.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.