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Finding the Fourth Proportional to 139,025.70, 208,538.55 and 79,976.70

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Solution

The fourth proportional to 139,025.70, 208,538.55 and 79,976.70 is: 119,965.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,025.70 : 208,538.55 = 79,976.70 : x
  2. Step 2: Convert to fraction form
    139,025.70/208,538.55 = 79,976.70/x
  3. Step 3: Cross multiply
    139,025.70x = 208,538.55 × 79,976.70
  4. Step 4: Simplify right side
    139,025.70x = 16,678,225,051.79
  5. Step 5: Solve for x
    x = 16,678,225,051.79/139,025.70
  6. Step 6: Final answer
    x = 119,965.05

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1.5x scale

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.