Home / 145,540.72-200,779.81-105,190.57

Finding the Fourth Proportional to 145,540.72, 200,779.81 and 105,190.57

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Solution

The fourth proportional to 145,540.72, 200,779.81 and 105,190.57 is: 145,115.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,540.72 : 200,779.81 = 105,190.57 : x
  2. Step 2: Convert to fraction form
    145,540.72/200,779.81 = 105,190.57/x
  3. Step 3: Cross multiply
    145,540.72x = 200,779.81 × 105,190.57
  4. Step 4: Simplify right side
    145,540.72x = 21,120,142,658.39
  5. Step 5: Solve for x
    x = 21,120,142,658.39/145,540.72
  6. Step 6: Final answer
    x = 145,115.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.