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Finding the Fourth Proportional to 70,115.10, 105,209.10 and 30,676.20

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Solution

The fourth proportional to 70,115.10, 105,209.10 and 30,676.20 is: 46,030.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,115.10 : 105,209.10 = 30,676.20 : x
  2. Step 2: Convert to fraction form
    70,115.10/105,209.10 = 30,676.20/x
  3. Step 3: Cross multiply
    70,115.10x = 105,209.10 × 30,676.20
  4. Step 4: Simplify right side
    70,115.10x = 3,227,415,393.42
  5. Step 5: Solve for x
    x = 3,227,415,393.42/70,115.10
  6. Step 6: Final answer
    x = 46,030.25

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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.