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Finding the Fourth Proportional to 66,972.40, 100,458.60 and 43,352.80

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Solution

The fourth proportional to 66,972.40, 100,458.60 and 43,352.80 is: 65,029.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,972.40 : 100,458.60 = 43,352.80 : x
  2. Step 2: Convert to fraction form
    66,972.40/100,458.60 = 43,352.80/x
  3. Step 3: Cross multiply
    66,972.40x = 100,458.60 × 43,352.80
  4. Step 4: Simplify right side
    66,972.40x = 4,355,161,594.08
  5. Step 5: Solve for x
    x = 4,355,161,594.08/66,972.40
  6. Step 6: Final answer
    x = 65,029.20

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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.