Home / 128,590.73-177,449.04-71,226.18

Finding the Fourth Proportional to 128,590.73, 177,449.04 and 71,226.18

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Solution

The fourth proportional to 128,590.73, 177,449.04 and 71,226.18 is: 98,288.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,590.73 : 177,449.04 = 71,226.18 : x
  2. Step 2: Convert to fraction form
    128,590.73/177,449.04 = 71,226.18/x
  3. Step 3: Cross multiply
    128,590.73x = 177,449.04 × 71,226.18
  4. Step 4: Simplify right side
    128,590.73x = 12,639,017,263.87
  5. Step 5: Solve for x
    x = 12,639,017,263.87/128,590.73
  6. Step 6: Final answer
    x = 98,288.71

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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.