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Finding the Fourth Proportional to 188,421.70, 260,019 and 103,536.94

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Solution

The fourth proportional to 188,421.70, 260,019 and 103,536.94 is: 142,879.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,421.70 : 260,019 = 103,536.94 : x
  2. Step 2: Convert to fraction form
    188,421.70/260,019 = 103,536.94/x
  3. Step 3: Cross multiply
    188,421.70x = 260,019 × 103,536.94
  4. Step 4: Simplify right side
    188,421.70x = 26,921,571,601.86
  5. Step 5: Solve for x
    x = 26,921,571,601.86/188,421.70
  6. Step 6: Final answer
    x = 142,879.36

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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.