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Finding the Fourth Proportional to 86,998.60, 130,497.90 and 40,342.60

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Solution

The fourth proportional to 86,998.60, 130,497.90 and 40,342.60 is: 60,513.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,998.60 : 130,497.90 = 40,342.60 : x
  2. Step 2: Convert to fraction form
    86,998.60/130,497.90 = 40,342.60/x
  3. Step 3: Cross multiply
    86,998.60x = 130,497.90 × 40,342.60
  4. Step 4: Simplify right side
    86,998.60x = 5,264,624,580.54
  5. Step 5: Solve for x
    x = 5,264,624,580.54/86,998.60
  6. Step 6: Final answer
    x = 60,513.90

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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.