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Finding the Fourth Proportional to 129,617, 178,949.22 and 84,982.76

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Solution

The fourth proportional to 129,617, 178,949.22 and 84,982.76 is: 117,327.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,617 : 178,949.22 = 84,982.76 : x
  2. Step 2: Convert to fraction form
    129,617/178,949.22 = 84,982.76/x
  3. Step 3: Cross multiply
    129,617x = 178,949.22 × 84,982.76
  4. Step 4: Simplify right side
    129,617x = 15,207,598,615.45
  5. Step 5: Solve for x
    x = 15,207,598,615.45/129,617
  6. Step 6: Final answer
    x = 117,327.19

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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.