Home / 90,129.82-135,076.47-66,325.94

Finding the Fourth Proportional to 90,129.82, 135,076.47 and 66,325.94

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Solution

The fourth proportional to 90,129.82, 135,076.47 and 66,325.94 is: 99,401.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,129.82 : 135,076.47 = 66,325.94 : x
  2. Step 2: Convert to fraction form
    90,129.82/135,076.47 = 66,325.94/x
  3. Step 3: Cross multiply
    90,129.82x = 135,076.47 × 66,325.94
  4. Step 4: Simplify right side
    90,129.82x = 8,959,074,373.41
  5. Step 5: Solve for x
    x = 8,959,074,373.41/90,129.82
  6. Step 6: Final answer
    x = 99,401.89

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1.5x scale

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.