Home / 81,090.16-111,903.37-45,280.78

Finding the Fourth Proportional to 81,090.16, 111,903.37 and 45,280.78

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Solution

The fourth proportional to 81,090.16, 111,903.37 and 45,280.78 is: 62,486.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,090.16 : 111,903.37 = 45,280.78 : x
  2. Step 2: Convert to fraction form
    81,090.16/111,903.37 = 45,280.78/x
  3. Step 3: Cross multiply
    81,090.16x = 111,903.37 × 45,280.78
  4. Step 4: Simplify right side
    81,090.16x = 5,067,071,878.23
  5. Step 5: Solve for x
    x = 5,067,071,878.23/81,090.16
  6. Step 6: Final answer
    x = 62,486.89

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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.