Home / 128,320.52-192,513.58-53,415.76

Finding the Fourth Proportional to 128,320.52, 192,513.58 and 53,415.76

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Solution

The fourth proportional to 128,320.52, 192,513.58 and 53,415.76 is: 80,137.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,320.52 : 192,513.58 = 53,415.76 : x
  2. Step 2: Convert to fraction form
    128,320.52/192,513.58 = 53,415.76/x
  3. Step 3: Cross multiply
    128,320.52x = 192,513.58 × 53,415.76
  4. Step 4: Simplify right side
    128,320.52x = 10,283,259,186.02
  5. Step 5: Solve for x
    x = 10,283,259,186.02/128,320.52
  6. Step 6: Final answer
    x = 80,137.29

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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.