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Finding the Fourth Proportional to 86,859.76, 119,850.88 and 51,057

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Solution

The fourth proportional to 86,859.76, 119,850.88 and 51,057 is: 70,449.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,859.76 : 119,850.88 = 51,057 : x
  2. Step 2: Convert to fraction form
    86,859.76/119,850.88 = 51,057/x
  3. Step 3: Cross multiply
    86,859.76x = 119,850.88 × 51,057
  4. Step 4: Simplify right side
    86,859.76x = 6,119,226,380.16
  5. Step 5: Solve for x
    x = 6,119,226,380.16/86,859.76
  6. Step 6: Final answer
    x = 70,449.50

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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.