Home / 128,143.76-176,777.04-80,373.20

Finding the Fourth Proportional to 128,143.76, 176,777.04 and 80,373.20

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Solution

The fourth proportional to 128,143.76, 176,777.04 and 80,373.20 is: 110,876.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,143.76 : 176,777.04 = 80,373.20 : x
  2. Step 2: Convert to fraction form
    128,143.76/176,777.04 = 80,373.20/x
  3. Step 3: Cross multiply
    128,143.76x = 176,777.04 × 80,373.20
  4. Step 4: Simplify right side
    128,143.76x = 14,208,136,391.33
  5. Step 5: Solve for x
    x = 14,208,136,391.33/128,143.76
  6. Step 6: Final answer
    x = 110,876.54

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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.