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Finding the Fourth Proportional to 50,912, 70,258.60 and 28,556

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Solution

The fourth proportional to 50,912, 70,258.60 and 28,556 is: 39,407.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,912 : 70,258.60 = 28,556 : x
  2. Step 2: Convert to fraction form
    50,912/70,258.60 = 28,556/x
  3. Step 3: Cross multiply
    50,912x = 70,258.60 × 28,556
  4. Step 4: Simplify right side
    50,912x = 2,006,304,581.60
  5. Step 5: Solve for x
    x = 2,006,304,581.60/50,912
  6. Step 6: Final answer
    x = 39,407.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.