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Finding the Fourth Proportional to 132,808.80, 199,213.20 and 115,312.80

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Solution

The fourth proportional to 132,808.80, 199,213.20 and 115,312.80 is: 172,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,808.80 : 199,213.20 = 115,312.80 : x
  2. Step 2: Convert to fraction form
    132,808.80/199,213.20 = 115,312.80/x
  3. Step 3: Cross multiply
    132,808.80x = 199,213.20 × 115,312.80
  4. Step 4: Simplify right side
    132,808.80x = 22,971,831,888.96
  5. Step 5: Solve for x
    x = 22,971,831,888.96/132,808.80
  6. Step 6: Final answer
    x = 172,969.20

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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.