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Finding the Fourth Proportional to 86,738.40, 130,107.60 and 86,738.40

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Solution

The fourth proportional to 86,738.40, 130,107.60 and 86,738.40 is: 130,107.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,738.40 : 130,107.60 = 86,738.40 : x
  2. Step 2: Convert to fraction form
    86,738.40/130,107.60 = 86,738.40/x
  3. Step 3: Cross multiply
    86,738.40x = 130,107.60 × 86,738.40
  4. Step 4: Simplify right side
    86,738.40x = 11,285,325,051.84
  5. Step 5: Solve for x
    x = 11,285,325,051.84/86,738.40
  6. Step 6: Final answer
    x = 130,107.60

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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.