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Finding the Fourth Proportional to 199,989.84, 300,000.69 and 66,870.93

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Solution

The fourth proportional to 199,989.84, 300,000.69 and 66,870.93 is: 100,311.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,989.84 : 300,000.69 = 66,870.93 : x
  2. Step 2: Convert to fraction form
    199,989.84/300,000.69 = 66,870.93/x
  3. Step 3: Cross multiply
    199,989.84x = 300,000.69 × 66,870.93
  4. Step 4: Simplify right side
    199,989.84x = 20,061,325,140.94
  5. Step 5: Solve for x
    x = 20,061,325,140.94/199,989.84
  6. Step 6: Final answer
    x = 100,311.72

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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.