Home / 128,108.07-192,159.45-42,725.08

Finding the Fourth Proportional to 128,108.07, 192,159.45 and 42,725.08

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Solution

The fourth proportional to 128,108.07, 192,159.45 and 42,725.08 is: 64,086.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,108.07 : 192,159.45 = 42,725.08 : x
  2. Step 2: Convert to fraction form
    128,108.07/192,159.45 = 42,725.08/x
  3. Step 3: Cross multiply
    128,108.07x = 192,159.45 × 42,725.08
  4. Step 4: Simplify right side
    128,108.07x = 8,210,027,874.01
  5. Step 5: Solve for x
    x = 8,210,027,874.01/128,108.07
  6. Step 6: Final answer
    x = 64,086.73

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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.