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Finding the Fourth Proportional to 70,175.80, 105,338.64 and 30,214.56

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Solution

The fourth proportional to 70,175.80, 105,338.64 and 30,214.56 is: 45,354.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,175.80 : 105,338.64 = 30,214.56 : x
  2. Step 2: Convert to fraction form
    70,175.80/105,338.64 = 30,214.56/x
  3. Step 3: Cross multiply
    70,175.80x = 105,338.64 × 30,214.56
  4. Step 4: Simplify right side
    70,175.80x = 3,182,760,658.60
  5. Step 5: Solve for x
    x = 3,182,760,658.60/70,175.80
  6. Step 6: Final answer
    x = 45,354.11

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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.