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Finding the Fourth Proportional to 70,512.90, 105,767.91 and 28,960.26

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Solution

The fourth proportional to 70,512.90, 105,767.91 and 28,960.26 is: 43,439.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,512.90 : 105,767.91 = 28,960.26 : x
  2. Step 2: Convert to fraction form
    70,512.90/105,767.91 = 28,960.26/x
  3. Step 3: Cross multiply
    70,512.90x = 105,767.91 × 28,960.26
  4. Step 4: Simplify right side
    70,512.90x = 3,063,066,173.26
  5. Step 5: Solve for x
    x = 3,063,066,173.26/70,512.90
  6. Step 6: Final answer
    x = 43,439.80

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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.