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Finding the Fourth Proportional to 145,923.60, 218,858.40 and 40,720.80

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Solution

The fourth proportional to 145,923.60, 218,858.40 and 40,720.80 is: 61,073.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,923.60 : 218,858.40 = 40,720.80 : x
  2. Step 2: Convert to fraction form
    145,923.60/218,858.40 = 40,720.80/x
  3. Step 3: Cross multiply
    145,923.60x = 218,858.40 × 40,720.80
  4. Step 4: Simplify right side
    145,923.60x = 8,912,089,134.72
  5. Step 5: Solve for x
    x = 8,912,089,134.72/145,923.60
  6. Step 6: Final answer
    x = 61,073.67

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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.