Home / 81,029.90-121,539.09-21,868.94

Finding the Fourth Proportional to 81,029.90, 121,539.09 and 21,868.94

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Solution

The fourth proportional to 81,029.90, 121,539.09 and 21,868.94 is: 32,801.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,029.90 : 121,539.09 = 21,868.94 : x
  2. Step 2: Convert to fraction form
    81,029.90/121,539.09 = 21,868.94/x
  3. Step 3: Cross multiply
    81,029.90x = 121,539.09 × 21,868.94
  4. Step 4: Simplify right side
    81,029.90x = 2,657,931,066.86
  5. Step 5: Solve for x
    x = 2,657,931,066.86/81,029.90
  6. Step 6: Final answer
    x = 32,801.86

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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.