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Finding the Fourth Proportional to 69,630.40, 104,445.60 and 66,908.80

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Solution

The fourth proportional to 69,630.40, 104,445.60 and 66,908.80 is: 100,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,630.40 : 104,445.60 = 66,908.80 : x
  2. Step 2: Convert to fraction form
    69,630.40/104,445.60 = 66,908.80/x
  3. Step 3: Cross multiply
    69,630.40x = 104,445.60 × 66,908.80
  4. Step 4: Simplify right side
    69,630.40x = 6,988,329,761.28
  5. Step 5: Solve for x
    x = 6,988,329,761.28/69,630.40
  6. Step 6: Final answer
    x = 100,363.20

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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.