Home / 129,515.34-178,662.76-89,159.04

Finding the Fourth Proportional to 129,515.34, 178,662.76 and 89,159.04

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Solution

The fourth proportional to 129,515.34, 178,662.76 and 89,159.04 is: 122,992.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,515.34 : 178,662.76 = 89,159.04 : x
  2. Step 2: Convert to fraction form
    129,515.34/178,662.76 = 89,159.04/x
  3. Step 3: Cross multiply
    129,515.34x = 178,662.76 × 89,159.04
  4. Step 4: Simplify right side
    129,515.34x = 15,929,400,131.13
  5. Step 5: Solve for x
    x = 15,929,400,131.13/129,515.34
  6. Step 6: Final answer
    x = 122,992.38

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1.5x scale

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.