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Finding the Fourth Proportional to 228,573.90, 342,871.65 and 70,912.80

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Solution

The fourth proportional to 228,573.90, 342,871.65 and 70,912.80 is: 106,372.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,573.90 : 342,871.65 = 70,912.80 : x
  2. Step 2: Convert to fraction form
    228,573.90/342,871.65 = 70,912.80/x
  3. Step 3: Cross multiply
    228,573.90x = 342,871.65 × 70,912.80
  4. Step 4: Simplify right side
    228,573.90x = 24,313,988,742.12
  5. Step 5: Solve for x
    x = 24,313,988,742.12/228,573.90
  6. Step 6: Final answer
    x = 106,372.55

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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.