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Finding the Fourth Proportional to 72,706.20, 109,059.30 and 71,669.40

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Solution

The fourth proportional to 72,706.20, 109,059.30 and 71,669.40 is: 107,504.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,706.20 : 109,059.30 = 71,669.40 : x
  2. Step 2: Convert to fraction form
    72,706.20/109,059.30 = 71,669.40/x
  3. Step 3: Cross multiply
    72,706.20x = 109,059.30 × 71,669.40
  4. Step 4: Simplify right side
    72,706.20x = 7,816,214,595.42
  5. Step 5: Solve for x
    x = 7,816,214,595.42/72,706.20
  6. Step 6: Final answer
    x = 107,504.10

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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.