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Finding the Fourth Proportional to 108,908.75, 163,209.90 and 86,623.22

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Solution

The fourth proportional to 108,908.75, 163,209.90 and 86,623.22 is: 129,812.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,908.75 : 163,209.90 = 86,623.22 : x
  2. Step 2: Convert to fraction form
    108,908.75/163,209.90 = 86,623.22/x
  3. Step 3: Cross multiply
    108,908.75x = 163,209.90 × 86,623.22
  4. Step 4: Simplify right side
    108,908.75x = 14,137,767,073.88
  5. Step 5: Solve for x
    x = 14,137,767,073.88/108,908.75
  6. Step 6: Final answer
    x = 129,812.96

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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.