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Finding the Fourth Proportional to 86,622.78, 119,539.74 and 46,878.78

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Solution

The fourth proportional to 86,622.78, 119,539.74 and 46,878.78 is: 64,692.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,622.78 : 119,539.74 = 46,878.78 : x
  2. Step 2: Convert to fraction form
    86,622.78/119,539.74 = 46,878.78/x
  3. Step 3: Cross multiply
    86,622.78x = 119,539.74 × 46,878.78
  4. Step 4: Simplify right side
    86,622.78x = 5,603,877,172.72
  5. Step 5: Solve for x
    x = 5,603,877,172.72/86,622.78
  6. Step 6: Final answer
    x = 64,692.88

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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.