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Finding the Fourth Proportional to 130,635.61, 195,621.04 and 86,127.33

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Solution

The fourth proportional to 130,635.61, 195,621.04 and 86,127.33 is: 128,971.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,635.61 : 195,621.04 = 86,127.33 : x
  2. Step 2: Convert to fraction form
    130,635.61/195,621.04 = 86,127.33/x
  3. Step 3: Cross multiply
    130,635.61x = 195,621.04 × 86,127.33
  4. Step 4: Simplify right side
    130,635.61x = 16,848,317,299.94
  5. Step 5: Solve for x
    x = 16,848,317,299.94/130,635.61
  6. Step 6: Final answer
    x = 128,971.86

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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.