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Finding the Fourth Proportional to 103,586.70, 155,504.52 and 70,205.49

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Solution

The fourth proportional to 103,586.70, 155,504.52 and 70,205.49 is: 105,392.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,586.70 : 155,504.52 = 70,205.49 : x
  2. Step 2: Convert to fraction form
    103,586.70/155,504.52 = 70,205.49/x
  3. Step 3: Cross multiply
    103,586.70x = 155,504.52 × 70,205.49
  4. Step 4: Simplify right side
    103,586.70x = 10,917,271,023.81
  5. Step 5: Solve for x
    x = 10,917,271,023.81/103,586.70
  6. Step 6: Final answer
    x = 105,392.59

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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.