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Finding the Fourth Proportional to 67,813.36, 101,730.92 and 21,055.28

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Solution

The fourth proportional to 67,813.36, 101,730.92 and 21,055.28 is: 31,586.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,813.36 : 101,730.92 = 21,055.28 : x
  2. Step 2: Convert to fraction form
    67,813.36/101,730.92 = 21,055.28/x
  3. Step 3: Cross multiply
    67,813.36x = 101,730.92 × 21,055.28
  4. Step 4: Simplify right side
    67,813.36x = 2,141,973,005.26
  5. Step 5: Solve for x
    x = 2,141,973,005.26/67,813.36
  6. Step 6: Final answer
    x = 31,586.30

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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.