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Finding the Fourth Proportional to 91,983.99, 127,034.28 and 63,378.03

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Solution

The fourth proportional to 91,983.99, 127,034.28 and 63,378.03 is: 87,528.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,983.99 : 127,034.28 = 63,378.03 : x
  2. Step 2: Convert to fraction form
    91,983.99/127,034.28 = 63,378.03/x
  3. Step 3: Cross multiply
    91,983.99x = 127,034.28 × 63,378.03
  4. Step 4: Simplify right side
    91,983.99x = 8,051,182,408.87
  5. Step 5: Solve for x
    x = 8,051,182,408.87/91,983.99
  6. Step 6: Final answer
    x = 87,528.08

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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.