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Finding the Fourth Proportional to 72,604.30, 108,906.45 and 70,660.30

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Solution

The fourth proportional to 72,604.30, 108,906.45 and 70,660.30 is: 105,990.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,604.30 : 108,906.45 = 70,660.30 : x
  2. Step 2: Convert to fraction form
    72,604.30/108,906.45 = 70,660.30/x
  3. Step 3: Cross multiply
    72,604.30x = 108,906.45 × 70,660.30
  4. Step 4: Simplify right side
    72,604.30x = 7,695,362,428.94
  5. Step 5: Solve for x
    x = 7,695,362,428.94/72,604.30
  6. Step 6: Final answer
    x = 105,990.45

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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.