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Finding the Fourth Proportional to 51,135, 70,572.78 and 28,783.32

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Solution

The fourth proportional to 51,135, 70,572.78 and 28,783.32 is: 39,724.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,135 : 70,572.78 = 28,783.32 : x
  2. Step 2: Convert to fraction form
    51,135/70,572.78 = 28,783.32/x
  3. Step 3: Cross multiply
    51,135x = 70,572.78 × 28,783.32
  4. Step 4: Simplify right side
    51,135x = 2,031,318,910.03
  5. Step 5: Solve for x
    x = 2,031,318,910.03/51,135
  6. Step 6: Final answer
    x = 39,724.63

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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.