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Finding the Fourth Proportional to 49,675.80, 74,513.70 and 40,920.60

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Solution

The fourth proportional to 49,675.80, 74,513.70 and 40,920.60 is: 61,380.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,675.80 : 74,513.70 = 40,920.60 : x
  2. Step 2: Convert to fraction form
    49,675.80/74,513.70 = 40,920.60/x
  3. Step 3: Cross multiply
    49,675.80x = 74,513.70 × 40,920.60
  4. Step 4: Simplify right side
    49,675.80x = 3,049,145,312.22
  5. Step 5: Solve for x
    x = 3,049,145,312.22/49,675.80
  6. Step 6: Final answer
    x = 61,380.90

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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.