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Finding the Fourth Proportional to 86,131.84, 118,859.74 and 47,889.42

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Solution

The fourth proportional to 86,131.84, 118,859.74 and 47,889.42 is: 66,086.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,131.84 : 118,859.74 = 47,889.42 : x
  2. Step 2: Convert to fraction form
    86,131.84/118,859.74 = 47,889.42/x
  3. Step 3: Cross multiply
    86,131.84x = 118,859.74 × 47,889.42
  4. Step 4: Simplify right side
    86,131.84x = 5,692,124,009.95
  5. Step 5: Solve for x
    x = 5,692,124,009.95/86,131.84
  6. Step 6: Final answer
    x = 66,086.18

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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.