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Finding the Fourth Proportional to 129,747.30, 194,620.95 and 70,698.30

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Solution

The fourth proportional to 129,747.30, 194,620.95 and 70,698.30 is: 106,047.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,747.30 : 194,620.95 = 70,698.30 : x
  2. Step 2: Convert to fraction form
    129,747.30/194,620.95 = 70,698.30/x
  3. Step 3: Cross multiply
    129,747.30x = 194,620.95 × 70,698.30
  4. Step 4: Simplify right side
    129,747.30x = 13,759,370,309.39
  5. Step 5: Solve for x
    x = 13,759,370,309.39/129,747.30
  6. Step 6: Final answer
    x = 106,047.45

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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.