Home / 81,326.68-121,994.80-31,407.04

Finding the Fourth Proportional to 81,326.68, 121,994.80 and 31,407.04

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Solution

The fourth proportional to 81,326.68, 121,994.80 and 31,407.04 is: 47,112.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,326.68 : 121,994.80 = 31,407.04 : x
  2. Step 2: Convert to fraction form
    81,326.68/121,994.80 = 31,407.04/x
  3. Step 3: Cross multiply
    81,326.68x = 121,994.80 × 31,407.04
  4. Step 4: Simplify right side
    81,326.68x = 3,831,494,953.42
  5. Step 5: Solve for x
    x = 3,831,494,953.42/81,326.68
  6. Step 6: Final answer
    x = 47,112.40

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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.