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Finding the Fourth Proportional to 102,706.10, 154,059.15 and 72,638.90

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Solution

The fourth proportional to 102,706.10, 154,059.15 and 72,638.90 is: 108,958.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,706.10 : 154,059.15 = 72,638.90 : x
  2. Step 2: Convert to fraction form
    102,706.10/154,059.15 = 72,638.90/x
  3. Step 3: Cross multiply
    102,706.10x = 154,059.15 × 72,638.90
  4. Step 4: Simplify right side
    102,706.10x = 11,190,687,190.94
  5. Step 5: Solve for x
    x = 11,190,687,190.94/102,706.10
  6. Step 6: Final answer
    x = 108,958.35

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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.