Home / 128,105.07-192,154.95-42,722.08

Finding the Fourth Proportional to 128,105.07, 192,154.95 and 42,722.08

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Solution

The fourth proportional to 128,105.07, 192,154.95 and 42,722.08 is: 64,082.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,105.07 : 192,154.95 = 42,722.08 : x
  2. Step 2: Convert to fraction form
    128,105.07/192,154.95 = 42,722.08/x
  3. Step 3: Cross multiply
    128,105.07x = 192,154.95 × 42,722.08
  4. Step 4: Simplify right side
    128,105.07x = 8,209,259,146.30
  5. Step 5: Solve for x
    x = 8,209,259,146.30/128,105.07
  6. Step 6: Final answer
    x = 64,082.23

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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.