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Finding the Fourth Proportional to 76,168.90, 105,112.90 and 43,903.26

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Solution

The fourth proportional to 76,168.90, 105,112.90 and 43,903.26 is: 60,586.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,168.90 : 105,112.90 = 43,903.26 : x
  2. Step 2: Convert to fraction form
    76,168.90/105,112.90 = 43,903.26/x
  3. Step 3: Cross multiply
    76,168.90x = 105,112.90 × 43,903.26
  4. Step 4: Simplify right side
    76,168.90x = 4,614,798,978.05
  5. Step 5: Solve for x
    x = 4,614,798,978.05/76,168.90
  6. Step 6: Final answer
    x = 60,586.39

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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.