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Finding the Fourth Proportional to 139,658.20, 209,495.94 and 69,466.84

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Solution

The fourth proportional to 139,658.20, 209,495.94 and 69,466.84 is: 104,204.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,658.20 : 209,495.94 = 69,466.84 : x
  2. Step 2: Convert to fraction form
    139,658.20/209,495.94 = 69,466.84/x
  3. Step 3: Cross multiply
    139,658.20x = 209,495.94 × 69,466.84
  4. Step 4: Simplify right side
    139,658.20x = 14,553,020,944.63
  5. Step 5: Solve for x
    x = 14,553,020,944.63/139,658.20
  6. Step 6: Final answer
    x = 104,204.56

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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.