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Finding the Fourth Proportional to 163,639.20, 245,113.20 and 135,991.20

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Solution

The fourth proportional to 163,639.20, 245,113.20 and 135,991.20 is: 203,699.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,639.20 : 245,113.20 = 135,991.20 : x
  2. Step 2: Convert to fraction form
    163,639.20/245,113.20 = 135,991.20/x
  3. Step 3: Cross multiply
    163,639.20x = 245,113.20 × 135,991.20
  4. Step 4: Simplify right side
    163,639.20x = 33,333,238,203.84
  5. Step 5: Solve for x
    x = 33,333,238,203.84/163,639.20
  6. Step 6: Final answer
    x = 203,699.59

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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.