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Finding the Fourth Proportional to 81,032.58, 121,548.90 and 21,868.17

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Solution

The fourth proportional to 81,032.58, 121,548.90 and 21,868.17 is: 32,802.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,032.58 : 121,548.90 = 21,868.17 : x
  2. Step 2: Convert to fraction form
    81,032.58/121,548.90 = 21,868.17/x
  3. Step 3: Cross multiply
    81,032.58x = 121,548.90 × 21,868.17
  4. Step 4: Simplify right side
    81,032.58x = 2,658,052,008.51
  5. Step 5: Solve for x
    x = 2,658,052,008.51/81,032.58
  6. Step 6: Final answer
    x = 32,802.26

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1.5x scale

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.