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Finding the Fourth Proportional to 86,551.40, 129,802.80 and 27,405.20

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Solution

The fourth proportional to 86,551.40, 129,802.80 and 27,405.20 is: 41,100.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,551.40 : 129,802.80 = 27,405.20 : x
  2. Step 2: Convert to fraction form
    86,551.40/129,802.80 = 27,405.20/x
  3. Step 3: Cross multiply
    86,551.40x = 129,802.80 × 27,405.20
  4. Step 4: Simplify right side
    86,551.40x = 3,557,271,694.56
  5. Step 5: Solve for x
    x = 3,557,271,694.56/86,551.40
  6. Step 6: Final answer
    x = 41,100.11

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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.