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Finding the Fourth Proportional to 70,721.40, 106,069.14 and 28,599.24

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Solution

The fourth proportional to 70,721.40, 106,069.14 and 28,599.24 is: 42,893.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,721.40 : 106,069.14 = 28,599.24 : x
  2. Step 2: Convert to fraction form
    70,721.40/106,069.14 = 28,599.24/x
  3. Step 3: Cross multiply
    70,721.40x = 106,069.14 × 28,599.24
  4. Step 4: Simplify right side
    70,721.40x = 3,033,496,791.45
  5. Step 5: Solve for x
    x = 3,033,496,791.45/70,721.40
  6. Step 6: Final answer
    x = 42,893.62

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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.