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Finding the Fourth Proportional to 86,710.69, 130,078.40 and 26,744.20

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Solution

The fourth proportional to 86,710.69, 130,078.40 and 26,744.20 is: 40,120.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,710.69 : 130,078.40 = 26,744.20 : x
  2. Step 2: Convert to fraction form
    86,710.69/130,078.40 = 26,744.20/x
  3. Step 3: Cross multiply
    86,710.69x = 130,078.40 × 26,744.20
  4. Step 4: Simplify right side
    86,710.69x = 3,478,842,745.28
  5. Step 5: Solve for x
    x = 3,478,842,745.28/86,710.69
  6. Step 6: Final answer
    x = 40,120.11

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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.