Home / 128,688.48-192,152.52-115,274.88

Finding the Fourth Proportional to 128,688.48, 192,152.52 and 115,274.88

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Solution

The fourth proportional to 128,688.48, 192,152.52 and 115,274.88 is: 172,123.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,688.48 : 192,152.52 = 115,274.88 : x
  2. Step 2: Convert to fraction form
    128,688.48/192,152.52 = 115,274.88/x
  3. Step 3: Cross multiply
    128,688.48x = 192,152.52 × 115,274.88
  4. Step 4: Simplify right side
    128,688.48x = 22,150,358,684.70
  5. Step 5: Solve for x
    x = 22,150,358,684.70/128,688.48
  6. Step 6: Final answer
    x = 172,123.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.