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Finding the Fourth Proportional to 90,076, 135,112.92 and 84,595.56

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Solution

The fourth proportional to 90,076, 135,112.92 and 84,595.56 is: 126,892.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,076 : 135,112.92 = 84,595.56 : x
  2. Step 2: Convert to fraction form
    90,076/135,112.92 = 84,595.56/x
  3. Step 3: Cross multiply
    90,076x = 135,112.92 × 84,595.56
  4. Step 4: Simplify right side
    90,076x = 11,429,953,130.64
  5. Step 5: Solve for x
    x = 11,429,953,130.64/90,076
  6. Step 6: Final answer
    x = 126,892.33

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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.