Home / 128,214.47-192,364.52-80,774.79

Finding the Fourth Proportional to 128,214.47, 192,364.52 and 80,774.79

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Solution

The fourth proportional to 128,214.47, 192,364.52 and 80,774.79 is: 121,189.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,214.47 : 192,364.52 = 80,774.79 : x
  2. Step 2: Convert to fraction form
    128,214.47/192,364.52 = 80,774.79/x
  3. Step 3: Cross multiply
    128,214.47x = 192,364.52 × 80,774.79
  4. Step 4: Simplify right side
    128,214.47x = 15,538,203,302.58
  5. Step 5: Solve for x
    x = 15,538,203,302.58/128,214.47
  6. Step 6: Final answer
    x = 121,189.16

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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.