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Finding the Fourth Proportional to 170,379.72, 255,570.53 and 70,485.80

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Solution

The fourth proportional to 170,379.72, 255,570.53 and 70,485.80 is: 105,729.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,379.72 : 255,570.53 = 70,485.80 : x
  2. Step 2: Convert to fraction form
    170,379.72/255,570.53 = 70,485.80/x
  3. Step 3: Cross multiply
    170,379.72x = 255,570.53 × 70,485.80
  4. Step 4: Simplify right side
    170,379.72x = 18,014,091,633.19
  5. Step 5: Solve for x
    x = 18,014,091,633.19/170,379.72
  6. Step 6: Final answer
    x = 105,729.08

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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.