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Finding the Fourth Proportional to 49,999.70, 74,999.55 and 20,402.30

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Solution

The fourth proportional to 49,999.70, 74,999.55 and 20,402.30 is: 30,603.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,999.70 : 74,999.55 = 20,402.30 : x
  2. Step 2: Convert to fraction form
    49,999.70/74,999.55 = 20,402.30/x
  3. Step 3: Cross multiply
    49,999.70x = 74,999.55 × 20,402.30
  4. Step 4: Simplify right side
    49,999.70x = 1,530,163,318.97
  5. Step 5: Solve for x
    x = 1,530,163,318.97/49,999.70
  6. Step 6: Final answer
    x = 30,603.45

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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.