Home / 81,090.08-121,585.44-28,505.60

Finding the Fourth Proportional to 81,090.08, 121,585.44 and 28,505.60

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Solution

The fourth proportional to 81,090.08, 121,585.44 and 28,505.60 is: 42,740.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,090.08 : 121,585.44 = 28,505.60 : x
  2. Step 2: Convert to fraction form
    81,090.08/121,585.44 = 28,505.60/x
  3. Step 3: Cross multiply
    81,090.08x = 121,585.44 × 28,505.60
  4. Step 4: Simplify right side
    81,090.08x = 3,465,865,918.46
  5. Step 5: Solve for x
    x = 3,465,865,918.46/81,090.08
  6. Step 6: Final answer
    x = 42,740.94

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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.