Home / 128,071.56-192,089.28-80,541.76

Finding the Fourth Proportional to 128,071.56, 192,089.28 and 80,541.76

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Solution

The fourth proportional to 128,071.56, 192,089.28 and 80,541.76 is: 120,801.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,071.56 : 192,089.28 = 80,541.76 : x
  2. Step 2: Convert to fraction form
    128,071.56/192,089.28 = 80,541.76/x
  3. Step 3: Cross multiply
    128,071.56x = 192,089.28 × 80,541.76
  4. Step 4: Simplify right side
    128,071.56x = 15,471,208,688.33
  5. Step 5: Solve for x
    x = 15,471,208,688.33/128,071.56
  6. Step 6: Final answer
    x = 120,801.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.