Home / 128,772.30-177,705.22-72,183.68

Finding the Fourth Proportional to 128,772.30, 177,705.22 and 72,183.68

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Solution

The fourth proportional to 128,772.30, 177,705.22 and 72,183.68 is: 99,613.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,772.30 : 177,705.22 = 72,183.68 : x
  2. Step 2: Convert to fraction form
    128,772.30/177,705.22 = 72,183.68/x
  3. Step 3: Cross multiply
    128,772.30x = 177,705.22 × 72,183.68
  4. Step 4: Simplify right side
    128,772.30x = 12,827,416,734.81
  5. Step 5: Solve for x
    x = 12,827,416,734.81/128,772.30
  6. Step 6: Final answer
    x = 99,613.17

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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.