Home / 129,285.93-178,392.83-71,917.68

Finding the Fourth Proportional to 129,285.93, 178,392.83 and 71,917.68

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Solution

The fourth proportional to 129,285.93, 178,392.83 and 71,917.68 is: 99,234.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,285.93 : 178,392.83 = 71,917.68 : x
  2. Step 2: Convert to fraction form
    129,285.93/178,392.83 = 71,917.68/x
  3. Step 3: Cross multiply
    129,285.93x = 178,392.83 × 71,917.68
  4. Step 4: Simplify right side
    129,285.93x = 12,829,598,642.03
  5. Step 5: Solve for x
    x = 12,829,598,642.03/129,285.93
  6. Step 6: Final answer
    x = 99,234.30

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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.