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Finding the Fourth Proportional to 72,706.30, 109,059.45 and 67,020.10

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Solution

The fourth proportional to 72,706.30, 109,059.45 and 67,020.10 is: 100,530.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,706.30 : 109,059.45 = 67,020.10 : x
  2. Step 2: Convert to fraction form
    72,706.30/109,059.45 = 67,020.10/x
  3. Step 3: Cross multiply
    72,706.30x = 109,059.45 × 67,020.10
  4. Step 4: Simplify right side
    72,706.30x = 7,309,175,244.95
  5. Step 5: Solve for x
    x = 7,309,175,244.95/72,706.30
  6. Step 6: Final answer
    x = 100,530.15

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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.