Home / 129,018.40-178,039.34-71,661.44

Finding the Fourth Proportional to 129,018.40, 178,039.34 and 71,661.44

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Solution

The fourth proportional to 129,018.40, 178,039.34 and 71,661.44 is: 98,889.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,018.40 : 178,039.34 = 71,661.44 : x
  2. Step 2: Convert to fraction form
    129,018.40/178,039.34 = 71,661.44/x
  3. Step 3: Cross multiply
    129,018.40x = 178,039.34 × 71,661.44
  4. Step 4: Simplify right side
    129,018.40x = 12,758,555,746.99
  5. Step 5: Solve for x
    x = 12,758,555,746.99/129,018.40
  6. Step 6: Final answer
    x = 98,889.43

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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.