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Finding the Fourth Proportional to 69,633.60, 96,106.64 and 39,420.64

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Solution

The fourth proportional to 69,633.60, 96,106.64 and 39,420.64 is: 54,407.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,633.60 : 96,106.64 = 39,420.64 : x
  2. Step 2: Convert to fraction form
    69,633.60/96,106.64 = 39,420.64/x
  3. Step 3: Cross multiply
    69,633.60x = 96,106.64 × 39,420.64
  4. Step 4: Simplify right side
    69,633.60x = 3,788,585,257.05
  5. Step 5: Solve for x
    x = 3,788,585,257.05/69,633.60
  6. Step 6: Final answer
    x = 54,407.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.