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Finding the Fourth Proportional to 86,891.40, 130,118.40 and 82,954.80

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Solution

The fourth proportional to 86,891.40, 130,118.40 and 82,954.80 is: 124,223.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,891.40 : 130,118.40 = 82,954.80 : x
  2. Step 2: Convert to fraction form
    86,891.40/130,118.40 = 82,954.80/x
  3. Step 3: Cross multiply
    86,891.40x = 130,118.40 × 82,954.80
  4. Step 4: Simplify right side
    86,891.40x = 10,793,945,848.32
  5. Step 5: Solve for x
    x = 10,793,945,848.32/86,891.40
  6. Step 6: Final answer
    x = 124,223.41

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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.