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Finding the Fourth Proportional to 70,710.80, 106,063.80 and 18,120.80

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Solution

The fourth proportional to 70,710.80, 106,063.80 and 18,120.80 is: 27,180.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,710.80 : 106,063.80 = 18,120.80 : x
  2. Step 2: Convert to fraction form
    70,710.80/106,063.80 = 18,120.80/x
  3. Step 3: Cross multiply
    70,710.80x = 106,063.80 × 18,120.80
  4. Step 4: Simplify right side
    70,710.80x = 1,921,960,907.04
  5. Step 5: Solve for x
    x = 1,921,960,907.04/70,710.80
  6. Step 6: Final answer
    x = 27,180.58

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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.