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Finding the Fourth Proportional to 108,806.36, 163,056.32 and 86,520.84

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Solution

The fourth proportional to 108,806.36, 163,056.32 and 86,520.84 is: 129,659.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,806.36 : 163,056.32 = 86,520.84 : x
  2. Step 2: Convert to fraction form
    108,806.36/163,056.32 = 86,520.84/x
  3. Step 3: Cross multiply
    108,806.36x = 163,056.32 × 86,520.84
  4. Step 4: Simplify right side
    108,806.36x = 14,107,769,773.71
  5. Step 5: Solve for x
    x = 14,107,769,773.71/108,806.36
  6. Step 6: Final answer
    x = 129,659.42

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1.5x scale

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.