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Finding the Fourth Proportional to 130,599.50, 195,899.22 and 86,215.86

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Solution

The fourth proportional to 130,599.50, 195,899.22 and 86,215.86 is: 129,323.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,599.50 : 195,899.22 = 86,215.86 : x
  2. Step 2: Convert to fraction form
    130,599.50/195,899.22 = 86,215.86/x
  3. Step 3: Cross multiply
    130,599.50x = 195,899.22 × 86,215.86
  4. Step 4: Simplify right side
    130,599.50x = 16,889,619,725.63
  5. Step 5: Solve for x
    x = 16,889,619,725.63/130,599.50
  6. Step 6: Final answer
    x = 129,323.77

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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.