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Finding the Fourth Proportional to 217,848.40, 326,729.40 and 105,528.40

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Solution

The fourth proportional to 217,848.40, 326,729.40 and 105,528.40 is: 158,271.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,848.40 : 326,729.40 = 105,528.40 : x
  2. Step 2: Convert to fraction form
    217,848.40/326,729.40 = 105,528.40/x
  3. Step 3: Cross multiply
    217,848.40x = 326,729.40 × 105,528.40
  4. Step 4: Simplify right side
    217,848.40x = 34,479,230,814.96
  5. Step 5: Solve for x
    x = 34,479,230,814.96/217,848.40
  6. Step 6: Final answer
    x = 158,271.67

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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.