Home / 135,445.23-186,915.79-81,719.86

Finding the Fourth Proportional to 135,445.23, 186,915.79 and 81,719.86

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Solution

The fourth proportional to 135,445.23, 186,915.79 and 81,719.86 is: 112,774.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,445.23 : 186,915.79 = 81,719.86 : x
  2. Step 2: Convert to fraction form
    135,445.23/186,915.79 = 81,719.86/x
  3. Step 3: Cross multiply
    135,445.23x = 186,915.79 × 81,719.86
  4. Step 4: Simplify right side
    135,445.23x = 15,274,731,781.99
  5. Step 5: Solve for x
    x = 15,274,731,781.99/135,445.23
  6. Step 6: Final answer
    x = 112,774.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.