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Finding the Fourth Proportional to 47,357.40, 70,971.30 and 38,609.40

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Solution

The fourth proportional to 47,357.40, 70,971.30 and 38,609.40 is: 57,861.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,357.40 : 70,971.30 = 38,609.40 : x
  2. Step 2: Convert to fraction form
    47,357.40/70,971.30 = 38,609.40/x
  3. Step 3: Cross multiply
    47,357.40x = 70,971.30 × 38,609.40
  4. Step 4: Simplify right side
    47,357.40x = 2,740,159,310.22
  5. Step 5: Solve for x
    x = 2,740,159,310.22/47,357.40
  6. Step 6: Final answer
    x = 57,861.27

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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.