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Finding the Fourth Proportional to 148,706.20, 223,059.30 and 85,720.60

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Solution

The fourth proportional to 148,706.20, 223,059.30 and 85,720.60 is: 128,580.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,706.20 : 223,059.30 = 85,720.60 : x
  2. Step 2: Convert to fraction form
    148,706.20/223,059.30 = 85,720.60/x
  3. Step 3: Cross multiply
    148,706.20x = 223,059.30 × 85,720.60
  4. Step 4: Simplify right side
    148,706.20x = 19,120,777,031.58
  5. Step 5: Solve for x
    x = 19,120,777,031.58/148,706.20
  6. Step 6: Final answer
    x = 128,580.90

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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.