Home / 129,492.12-178,672-75,766.80

Finding the Fourth Proportional to 129,492.12, 178,672 and 75,766.80

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Solution

The fourth proportional to 129,492.12, 178,672 and 75,766.80 is: 104,542.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,492.12 : 178,672 = 75,766.80 : x
  2. Step 2: Convert to fraction form
    129,492.12/178,672 = 75,766.80/x
  3. Step 3: Cross multiply
    129,492.12x = 178,672 × 75,766.80
  4. Step 4: Simplify right side
    129,492.12x = 13,537,405,689.60
  5. Step 5: Solve for x
    x = 13,537,405,689.60/129,492.12
  6. Step 6: Final answer
    x = 104,542.31

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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.