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Finding the Fourth Proportional to 81,855.90, 112,893.75 and 48,289.50

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Solution

The fourth proportional to 81,855.90, 112,893.75 and 48,289.50 is: 66,599.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,855.90 : 112,893.75 = 48,289.50 : x
  2. Step 2: Convert to fraction form
    81,855.90/112,893.75 = 48,289.50/x
  3. Step 3: Cross multiply
    81,855.90x = 112,893.75 × 48,289.50
  4. Step 4: Simplify right side
    81,855.90x = 5,451,582,740.63
  5. Step 5: Solve for x
    x = 5,451,582,740.63/81,855.90
  6. Step 6: Final answer
    x = 66,599.75

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1.5x scale

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.