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Finding the Fourth Proportional to 81,089.80, 121,634.40 and 21,925.46

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Solution

The fourth proportional to 81,089.80, 121,634.40 and 21,925.46 is: 32,888.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,089.80 : 121,634.40 = 21,925.46 : x
  2. Step 2: Convert to fraction form
    81,089.80/121,634.40 = 21,925.46/x
  3. Step 3: Cross multiply
    81,089.80x = 121,634.40 × 21,925.46
  4. Step 4: Simplify right side
    81,089.80x = 2,666,890,475.91
  5. Step 5: Solve for x
    x = 2,666,890,475.91/81,089.80
  6. Step 6: Final answer
    x = 32,888.11

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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.