Home / 129,052.88-178,157.73-80,681.68

Finding the Fourth Proportional to 129,052.88, 178,157.73 and 80,681.68

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Solution

The fourth proportional to 129,052.88, 178,157.73 and 80,681.68 is: 111,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,052.88 : 178,157.73 = 80,681.68 : x
  2. Step 2: Convert to fraction form
    129,052.88/178,157.73 = 80,681.68/x
  3. Step 3: Cross multiply
    129,052.88x = 178,157.73 × 80,681.68
  4. Step 4: Simplify right side
    129,052.88x = 14,374,064,961.39
  5. Step 5: Solve for x
    x = 14,374,064,961.39/129,052.88
  6. Step 6: Final answer
    x = 111,381.20

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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.