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Finding the Fourth Proportional to 145,912.80, 218,707.20 and 57,136.80

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Solution

The fourth proportional to 145,912.80, 218,707.20 and 57,136.80 is: 85,641.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,912.80 : 218,707.20 = 57,136.80 : x
  2. Step 2: Convert to fraction form
    145,912.80/218,707.20 = 57,136.80/x
  3. Step 3: Cross multiply
    145,912.80x = 218,707.20 × 57,136.80
  4. Step 4: Simplify right side
    145,912.80x = 12,496,229,544.96
  5. Step 5: Solve for x
    x = 12,496,229,544.96/145,912.80
  6. Step 6: Final answer
    x = 85,641.76

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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.