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Finding the Fourth Proportional to 70,408.74, 105,604.90 and 28,287.12

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Solution

The fourth proportional to 70,408.74, 105,604.90 and 28,287.12 is: 42,427.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,408.74 : 105,604.90 = 28,287.12 : x
  2. Step 2: Convert to fraction form
    70,408.74/105,604.90 = 28,287.12/x
  3. Step 3: Cross multiply
    70,408.74x = 105,604.90 × 28,287.12
  4. Step 4: Simplify right side
    70,408.74x = 2,987,258,804.19
  5. Step 5: Solve for x
    x = 2,987,258,804.19/70,408.74
  6. Step 6: Final answer
    x = 42,427.38

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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.