Home / 111,218.10-153,550.70-85,676.37

Finding the Fourth Proportional to 111,218.10, 153,550.70 and 85,676.37

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Solution

The fourth proportional to 111,218.10, 153,550.70 and 85,676.37 is: 118,287.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,218.10 : 153,550.70 = 85,676.37 : x
  2. Step 2: Convert to fraction form
    111,218.10/153,550.70 = 85,676.37/x
  3. Step 3: Cross multiply
    111,218.10x = 153,550.70 × 85,676.37
  4. Step 4: Simplify right side
    111,218.10x = 13,155,666,158.58
  5. Step 5: Solve for x
    x = 13,155,666,158.58/111,218.10
  6. Step 6: Final answer
    x = 118,287.10

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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.