Home / 128,749.92-177,677.01-71,391.66

Finding the Fourth Proportional to 128,749.92, 177,677.01 and 71,391.66

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Solution

The fourth proportional to 128,749.92, 177,677.01 and 71,391.66 is: 98,521.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,749.92 : 177,677.01 = 71,391.66 : x
  2. Step 2: Convert to fraction form
    128,749.92/177,677.01 = 71,391.66/x
  3. Step 3: Cross multiply
    128,749.92x = 177,677.01 × 71,391.66
  4. Step 4: Simplify right side
    128,749.92x = 12,684,656,687.74
  5. Step 5: Solve for x
    x = 12,684,656,687.74/128,749.92
  6. Step 6: Final answer
    x = 98,521.67

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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.