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Finding the Fourth Proportional to 139,226.80, 208,840.20 and 40,730.80

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Solution

The fourth proportional to 139,226.80, 208,840.20 and 40,730.80 is: 61,096.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,226.80 : 208,840.20 = 40,730.80 : x
  2. Step 2: Convert to fraction form
    139,226.80/208,840.20 = 40,730.80/x
  3. Step 3: Cross multiply
    139,226.80x = 208,840.20 × 40,730.80
  4. Step 4: Simplify right side
    139,226.80x = 8,506,228,418.16
  5. Step 5: Solve for x
    x = 8,506,228,418.16/139,226.80
  6. Step 6: Final answer
    x = 61,096.20

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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.