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Finding the Fourth Proportional to 219,654.32, 303,127.80 and 134,721.20

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Solution

The fourth proportional to 219,654.32, 303,127.80 and 134,721.20 is: 185,918.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,654.32 : 303,127.80 = 134,721.20 : x
  2. Step 2: Convert to fraction form
    219,654.32/303,127.80 = 134,721.20/x
  3. Step 3: Cross multiply
    219,654.32x = 303,127.80 × 134,721.20
  4. Step 4: Simplify right side
    219,654.32x = 40,837,740,969.36
  5. Step 5: Solve for x
    x = 40,837,740,969.36/219,654.32
  6. Step 6: Final answer
    x = 185,918.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.