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Finding the Fourth Proportional to 53,311.72, 79,961.94 and 28,325.32

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Solution

The fourth proportional to 53,311.72, 79,961.94 and 28,325.32 is: 42,484.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,311.72 : 79,961.94 = 28,325.32 : x
  2. Step 2: Convert to fraction form
    53,311.72/79,961.94 = 28,325.32/x
  3. Step 3: Cross multiply
    53,311.72x = 79,961.94 × 28,325.32
  4. Step 4: Simplify right side
    53,311.72x = 2,264,947,538.32
  5. Step 5: Solve for x
    x = 2,264,947,538.32/53,311.72
  6. Step 6: Final answer
    x = 42,484.98

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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.