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Finding the Fourth Proportional to 70,020.36, 105,030 and 17,429.49

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Solution

The fourth proportional to 70,020.36, 105,030 and 17,429.49 is: 26,144.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,020.36 : 105,030 = 17,429.49 : x
  2. Step 2: Convert to fraction form
    70,020.36/105,030 = 17,429.49/x
  3. Step 3: Cross multiply
    70,020.36x = 105,030 × 17,429.49
  4. Step 4: Simplify right side
    70,020.36x = 1,830,619,334.70
  5. Step 5: Solve for x
    x = 1,830,619,334.70/70,020.36
  6. Step 6: Final answer
    x = 26,144.10

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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.