Home / 122,128.80-183,193.20-86,699.40

Finding the Fourth Proportional to 122,128.80, 183,193.20 and 86,699.40

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Solution

The fourth proportional to 122,128.80, 183,193.20 and 86,699.40 is: 130,049.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,128.80 : 183,193.20 = 86,699.40 : x
  2. Step 2: Convert to fraction form
    122,128.80/183,193.20 = 86,699.40/x
  3. Step 3: Cross multiply
    122,128.80x = 183,193.20 × 86,699.40
  4. Step 4: Simplify right side
    122,128.80x = 15,882,740,524.08
  5. Step 5: Solve for x
    x = 15,882,740,524.08/122,128.80
  6. Step 6: Final answer
    x = 130,049.10

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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.