Home / 90,359.02-135,390.69-54,712.33

Finding the Fourth Proportional to 90,359.02, 135,390.69 and 54,712.33

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Solution

The fourth proportional to 90,359.02, 135,390.69 and 54,712.33 is: 81,978.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,359.02 : 135,390.69 = 54,712.33 : x
  2. Step 2: Convert to fraction form
    90,359.02/135,390.69 = 54,712.33/x
  3. Step 3: Cross multiply
    90,359.02x = 135,390.69 × 54,712.33
  4. Step 4: Simplify right side
    90,359.02x = 7,407,540,110.21
  5. Step 5: Solve for x
    x = 7,407,540,110.21/90,359.02
  6. Step 6: Final answer
    x = 81,978.98

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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.