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Finding the Fourth Proportional to 104,306.32, 143,920.56 and 61,878.64

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Solution

The fourth proportional to 104,306.32, 143,920.56 and 61,878.64 is: 85,379.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,306.32 : 143,920.56 = 61,878.64 : x
  2. Step 2: Convert to fraction form
    104,306.32/143,920.56 = 61,878.64/x
  3. Step 3: Cross multiply
    104,306.32x = 143,920.56 × 61,878.64
  4. Step 4: Simplify right side
    104,306.32x = 8,905,608,520.84
  5. Step 5: Solve for x
    x = 8,905,608,520.84/104,306.32
  6. Step 6: Final answer
    x = 85,379.38

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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.