Home / 128,450.19-177,257.61-71,091.86

Finding the Fourth Proportional to 128,450.19, 177,257.61 and 71,091.86

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Solution

The fourth proportional to 128,450.19, 177,257.61 and 71,091.86 is: 98,104.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,450.19 : 177,257.61 = 71,091.86 : x
  2. Step 2: Convert to fraction form
    128,450.19/177,257.61 = 71,091.86/x
  3. Step 3: Cross multiply
    128,450.19x = 177,257.61 × 71,091.86
  4. Step 4: Simplify right side
    128,450.19x = 12,601,572,307.77
  5. Step 5: Solve for x
    x = 12,601,572,307.77/128,450.19
  6. Step 6: Final answer
    x = 98,104.74

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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.