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Finding the Fourth Proportional to 70,907.57, 106,381.13 and 30,930.13

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Solution

The fourth proportional to 70,907.57, 106,381.13 and 30,930.13 is: 46,403.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,907.57 : 106,381.13 = 30,930.13 : x
  2. Step 2: Convert to fraction form
    70,907.57/106,381.13 = 30,930.13/x
  3. Step 3: Cross multiply
    70,907.57x = 106,381.13 × 30,930.13
  4. Step 4: Simplify right side
    70,907.57x = 3,290,381,493.89
  5. Step 5: Solve for x
    x = 3,290,381,493.89/70,907.57
  6. Step 6: Final answer
    x = 46,403.81

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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.