Home / 81,157.53-121,731.74-21,988.86

Finding the Fourth Proportional to 81,157.53, 121,731.74 and 21,988.86

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Solution

The fourth proportional to 81,157.53, 121,731.74 and 21,988.86 is: 32,982.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,157.53 : 121,731.74 = 21,988.86 : x
  2. Step 2: Convert to fraction form
    81,157.53/121,731.74 = 21,988.86/x
  3. Step 3: Cross multiply
    81,157.53x = 121,731.74 × 21,988.86
  4. Step 4: Simplify right side
    81,157.53x = 2,676,742,188.42
  5. Step 5: Solve for x
    x = 2,676,742,188.42/81,157.53
  6. Step 6: Final answer
    x = 32,982.06

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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.