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Finding the Fourth Proportional to 139,049.79, 208,594.67 and 42,994.49

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Solution

The fourth proportional to 139,049.79, 208,594.67 and 42,994.49 is: 64,497.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,049.79 : 208,594.67 = 42,994.49 : x
  2. Step 2: Convert to fraction form
    139,049.79/208,594.67 = 42,994.49/x
  3. Step 3: Cross multiply
    139,049.79x = 208,594.67 × 42,994.49
  4. Step 4: Simplify right side
    139,049.79x = 8,968,420,977.65
  5. Step 5: Solve for x
    x = 8,968,420,977.65/139,049.79
  6. Step 6: Final answer
    x = 64,497.91

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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.