Home / 100,804.20-139,100.76-58,365.60

Finding the Fourth Proportional to 100,804.20, 139,100.76 and 58,365.60

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Solution

The fourth proportional to 100,804.20, 139,100.76 and 58,365.60 is: 80,539.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,804.20 : 139,100.76 = 58,365.60 : x
  2. Step 2: Convert to fraction form
    100,804.20/139,100.76 = 58,365.60/x
  3. Step 3: Cross multiply
    100,804.20x = 139,100.76 × 58,365.60
  4. Step 4: Simplify right side
    100,804.20x = 8,118,699,317.86
  5. Step 5: Solve for x
    x = 8,118,699,317.86/100,804.20
  6. Step 6: Final answer
    x = 80,539.30

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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.