Home / 81,090.12-111,891.60-45,278.40

Finding the Fourth Proportional to 81,090.12, 111,891.60 and 45,278.40

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Solution

The fourth proportional to 81,090.12, 111,891.60 and 45,278.40 is: 62,477.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,090.12 : 111,891.60 = 45,278.40 : x
  2. Step 2: Convert to fraction form
    81,090.12/111,891.60 = 45,278.40/x
  3. Step 3: Cross multiply
    81,090.12x = 111,891.60 × 45,278.40
  4. Step 4: Simplify right side
    81,090.12x = 5,066,272,621.44
  5. Step 5: Solve for x
    x = 5,066,272,621.44/81,090.12
  6. Step 6: Final answer
    x = 62,477.06

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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.