Home / 128,145.90-192,218.85-115,461.30

Finding the Fourth Proportional to 128,145.90, 192,218.85 and 115,461.30

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Solution

The fourth proportional to 128,145.90, 192,218.85 and 115,461.30 is: 173,191.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,145.90 : 192,218.85 = 115,461.30 : x
  2. Step 2: Convert to fraction form
    128,145.90/192,218.85 = 115,461.30/x
  3. Step 3: Cross multiply
    128,145.90x = 192,218.85 × 115,461.30
  4. Step 4: Simplify right side
    128,145.90x = 22,193,838,305.51
  5. Step 5: Solve for x
    x = 22,193,838,305.51/128,145.90
  6. Step 6: Final answer
    x = 173,191.95

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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.