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Finding the Fourth Proportional to 66,911.26, 100,405.76 and 29,975.26

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Solution

The fourth proportional to 66,911.26, 100,405.76 and 29,975.26 is: 44,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,911.26 : 100,405.76 = 29,975.26 : x
  2. Step 2: Convert to fraction form
    66,911.26/100,405.76 = 29,975.26/x
  3. Step 3: Cross multiply
    66,911.26x = 100,405.76 × 29,975.26
  4. Step 4: Simplify right side
    66,911.26x = 3,009,688,761.50
  5. Step 5: Solve for x
    x = 3,009,688,761.50/66,911.26
  6. Step 6: Final answer
    x = 44,980.30

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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.