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Finding the Fourth Proportional to 70,980, 106,453.59 and 21,048.04

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Solution

The fourth proportional to 70,980, 106,453.59 and 21,048.04 is: 31,567.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,980 : 106,453.59 = 21,048.04 : x
  2. Step 2: Convert to fraction form
    70,980/106,453.59 = 21,048.04/x
  3. Step 3: Cross multiply
    70,980x = 106,453.59 × 21,048.04
  4. Step 4: Simplify right side
    70,980x = 2,240,639,420.46
  5. Step 5: Solve for x
    x = 2,240,639,420.46/70,980
  6. Step 6: Final answer
    x = 31,567.19

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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.