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Finding the Fourth Proportional to 86,122.94, 118,859.50 and 47,886.30

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Solution

The fourth proportional to 86,122.94, 118,859.50 and 47,886.30 is: 66,088.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,122.94 : 118,859.50 = 47,886.30 : x
  2. Step 2: Convert to fraction form
    86,122.94/118,859.50 = 47,886.30/x
  3. Step 3: Cross multiply
    86,122.94x = 118,859.50 × 47,886.30
  4. Step 4: Simplify right side
    86,122.94x = 5,691,741,674.85
  5. Step 5: Solve for x
    x = 5,691,741,674.85/86,122.94
  6. Step 6: Final answer
    x = 66,088.57

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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.