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Finding the Fourth Proportional to 81,051.66, 121,577.13 and 21,893.40

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Solution

The fourth proportional to 81,051.66, 121,577.13 and 21,893.40 is: 32,840.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,051.66 : 121,577.13 = 21,893.40 : x
  2. Step 2: Convert to fraction form
    81,051.66/121,577.13 = 21,893.40/x
  3. Step 3: Cross multiply
    81,051.66x = 121,577.13 × 21,893.40
  4. Step 4: Simplify right side
    81,051.66x = 2,661,736,737.94
  5. Step 5: Solve for x
    x = 2,661,736,737.94/81,051.66
  6. Step 6: Final answer
    x = 32,840.00

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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.