Home / 81,030.40-121,539.84-21,869.44

Finding the Fourth Proportional to 81,030.40, 121,539.84 and 21,869.44

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Solution

The fourth proportional to 81,030.40, 121,539.84 and 21,869.44 is: 32,802.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,030.40 : 121,539.84 = 21,869.44 : x
  2. Step 2: Convert to fraction form
    81,030.40/121,539.84 = 21,869.44/x
  3. Step 3: Cross multiply
    81,030.40x = 121,539.84 × 21,869.44
  4. Step 4: Simplify right side
    81,030.40x = 2,658,008,238.49
  5. Step 5: Solve for x
    x = 2,658,008,238.49/81,030.40
  6. Step 6: Final answer
    x = 32,802.61

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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.