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Finding the Fourth Proportional to 70,304.40, 105,440.04 and 20,371.32

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Solution

The fourth proportional to 70,304.40, 105,440.04 and 20,371.32 is: 30,552.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,304.40 : 105,440.04 = 20,371.32 : x
  2. Step 2: Convert to fraction form
    70,304.40/105,440.04 = 20,371.32/x
  3. Step 3: Cross multiply
    70,304.40x = 105,440.04 × 20,371.32
  4. Step 4: Simplify right side
    70,304.40x = 2,147,952,795.65
  5. Step 5: Solve for x
    x = 2,147,952,795.65/70,304.40
  6. Step 6: Final answer
    x = 30,552.18

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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.