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Finding the Fourth Proportional to 69,012.80, 103,416.60 and 35,688.40

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Solution

The fourth proportional to 69,012.80, 103,416.60 and 35,688.40 is: 53,479.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,012.80 : 103,416.60 = 35,688.40 : x
  2. Step 2: Convert to fraction form
    69,012.80/103,416.60 = 35,688.40/x
  3. Step 3: Cross multiply
    69,012.80x = 103,416.60 × 35,688.40
  4. Step 4: Simplify right side
    69,012.80x = 3,690,772,987.44
  5. Step 5: Solve for x
    x = 3,690,772,987.44/69,012.80
  6. Step 6: Final answer
    x = 53,479.54

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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.