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Finding the Fourth Proportional to 139,033.60, 208,501.80 and 72,451.60

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Solution

The fourth proportional to 139,033.60, 208,501.80 and 72,451.60 is: 108,652.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,033.60 : 208,501.80 = 72,451.60 : x
  2. Step 2: Convert to fraction form
    139,033.60/208,501.80 = 72,451.60/x
  3. Step 3: Cross multiply
    139,033.60x = 208,501.80 × 72,451.60
  4. Step 4: Simplify right side
    139,033.60x = 15,106,289,012.88
  5. Step 5: Solve for x
    x = 15,106,289,012.88/139,033.60
  6. Step 6: Final answer
    x = 108,652.07

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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.