Home / 103,640.40-143,023.96-61,201.64

Finding the Fourth Proportional to 103,640.40, 143,023.96 and 61,201.64

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Solution

The fourth proportional to 103,640.40, 143,023.96 and 61,201.64 is: 84,458.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.40 : 143,023.96 = 61,201.64 : x
  2. Step 2: Convert to fraction form
    103,640.40/143,023.96 = 61,201.64/x
  3. Step 3: Cross multiply
    103,640.40x = 143,023.96 × 61,201.64
  4. Step 4: Simplify right side
    103,640.40x = 8,753,300,911.29
  5. Step 5: Solve for x
    x = 8,753,300,911.29/103,640.40
  6. Step 6: Final answer
    x = 84,458.39

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1.5x scale

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.