Home / 128,645.20-192,708.60-73,176.40

Finding the Fourth Proportional to 128,645.20, 192,708.60 and 73,176.40

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Solution

The fourth proportional to 128,645.20, 192,708.60 and 73,176.40 is: 109,617.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,645.20 : 192,708.60 = 73,176.40 : x
  2. Step 2: Convert to fraction form
    128,645.20/192,708.60 = 73,176.40/x
  3. Step 3: Cross multiply
    128,645.20x = 192,708.60 × 73,176.40
  4. Step 4: Simplify right side
    128,645.20x = 14,101,721,597.04
  5. Step 5: Solve for x
    x = 14,101,721,597.04/128,645.20
  6. Step 6: Final answer
    x = 109,617.16

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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.