Home / 128,278.91-176,909.54-82,909.19

Finding the Fourth Proportional to 128,278.91, 176,909.54 and 82,909.19

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Solution

The fourth proportional to 128,278.91, 176,909.54 and 82,909.19 is: 114,340.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,278.91 : 176,909.54 = 82,909.19 : x
  2. Step 2: Convert to fraction form
    128,278.91/176,909.54 = 82,909.19/x
  3. Step 3: Cross multiply
    128,278.91x = 176,909.54 × 82,909.19
  4. Step 4: Simplify right side
    128,278.91x = 14,667,426,692.40
  5. Step 5: Solve for x
    x = 14,667,426,692.40/128,278.91
  6. Step 6: Final answer
    x = 114,340.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.