Home / 86,000.54-128,667.09-75,390.77

Finding the Fourth Proportional to 86,000.54, 128,667.09 and 75,390.77

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Solution

The fourth proportional to 86,000.54, 128,667.09 and 75,390.77 is: 112,793.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,000.54 : 128,667.09 = 75,390.77 : x
  2. Step 2: Convert to fraction form
    86,000.54/128,667.09 = 75,390.77/x
  3. Step 3: Cross multiply
    86,000.54x = 128,667.09 × 75,390.77
  4. Step 4: Simplify right side
    86,000.54x = 9,700,310,988.76
  5. Step 5: Solve for x
    x = 9,700,310,988.76/86,000.54
  6. Step 6: Final answer
    x = 112,793.61

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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.