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Finding the Fourth Proportional to 86,054.69, 128,972.52 and 48,635.64

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Solution

The fourth proportional to 86,054.69, 128,972.52 and 48,635.64 is: 72,891.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,054.69 : 128,972.52 = 48,635.64 : x
  2. Step 2: Convert to fraction form
    86,054.69/128,972.52 = 48,635.64/x
  3. Step 3: Cross multiply
    86,054.69x = 128,972.52 × 48,635.64
  4. Step 4: Simplify right side
    86,054.69x = 6,272,661,052.61
  5. Step 5: Solve for x
    x = 6,272,661,052.61/86,054.69
  6. Step 6: Final answer
    x = 72,891.56

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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.