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Finding the Fourth Proportional to 91,529.60, 137,121.60 and 47,004.80

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Solution

The fourth proportional to 91,529.60, 137,121.60 and 47,004.80 is: 70,418.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,529.60 : 137,121.60 = 47,004.80 : x
  2. Step 2: Convert to fraction form
    91,529.60/137,121.60 = 47,004.80/x
  3. Step 3: Cross multiply
    91,529.60x = 137,121.60 × 47,004.80
  4. Step 4: Simplify right side
    91,529.60x = 6,445,373,383.68
  5. Step 5: Solve for x
    x = 6,445,373,383.68/91,529.60
  6. Step 6: Final answer
    x = 70,418.46

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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.