Home / 128,861.13-177,906.12-84,226.89

Finding the Fourth Proportional to 128,861.13, 177,906.12 and 84,226.89

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Solution

The fourth proportional to 128,861.13, 177,906.12 and 84,226.89 is: 116,283.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,861.13 : 177,906.12 = 84,226.89 : x
  2. Step 2: Convert to fraction form
    128,861.13/177,906.12 = 84,226.89/x
  3. Step 3: Cross multiply
    128,861.13x = 177,906.12 × 84,226.89
  4. Step 4: Simplify right side
    128,861.13x = 14,984,477,888.90
  5. Step 5: Solve for x
    x = 14,984,477,888.90/128,861.13
  6. Step 6: Final answer
    x = 116,283.93

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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.