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Finding the Fourth Proportional to 50,815.75, 70,125.74 and 28,459.75

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Solution

The fourth proportional to 50,815.75, 70,125.74 and 28,459.75 is: 39,274.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,815.75 : 70,125.74 = 28,459.75 : x
  2. Step 2: Convert to fraction form
    50,815.75/70,125.74 = 28,459.75/x
  3. Step 3: Cross multiply
    50,815.75x = 70,125.74 × 28,459.75
  4. Step 4: Simplify right side
    50,815.75x = 1,995,760,886.67
  5. Step 5: Solve for x
    x = 1,995,760,886.67/50,815.75
  6. Step 6: Final answer
    x = 39,274.46

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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.