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Finding the Fourth Proportional to 76,954.60, 115,407.90 and 30,221.80

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Solution

The fourth proportional to 76,954.60, 115,407.90 and 30,221.80 is: 45,323.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,954.60 : 115,407.90 = 30,221.80 : x
  2. Step 2: Convert to fraction form
    76,954.60/115,407.90 = 30,221.80/x
  3. Step 3: Cross multiply
    76,954.60x = 115,407.90 × 30,221.80
  4. Step 4: Simplify right side
    76,954.60x = 3,487,834,472.22
  5. Step 5: Solve for x
    x = 3,487,834,472.22/76,954.60
  6. Step 6: Final answer
    x = 45,323.27

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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.