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Finding the Fourth Proportional to 51,246, 70,719.60 and 28,890

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Solution

The fourth proportional to 51,246, 70,719.60 and 28,890 is: 39,868.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,246 : 70,719.60 = 28,890 : x
  2. Step 2: Convert to fraction form
    51,246/70,719.60 = 28,890/x
  3. Step 3: Cross multiply
    51,246x = 70,719.60 × 28,890
  4. Step 4: Simplify right side
    51,246x = 2,043,089,244.00
  5. Step 5: Solve for x
    x = 2,043,089,244.00/51,246
  6. Step 6: Final answer
    x = 39,868.27

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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.