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Finding the Fourth Proportional to 86,892.31, 130,115.06 and 60,200.28

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Solution

The fourth proportional to 86,892.31, 130,115.06 and 60,200.28 is: 90,145.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,892.31 : 130,115.06 = 60,200.28 : x
  2. Step 2: Convert to fraction form
    86,892.31/130,115.06 = 60,200.28/x
  3. Step 3: Cross multiply
    86,892.31x = 130,115.06 × 60,200.28
  4. Step 4: Simplify right side
    86,892.31x = 7,832,962,968.97
  5. Step 5: Solve for x
    x = 7,832,962,968.97/86,892.31
  6. Step 6: Final answer
    x = 90,145.64

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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.