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Finding the Fourth Proportional to 65,315.28, 90,135.06 and 35,507.28

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Solution

The fourth proportional to 65,315.28, 90,135.06 and 35,507.28 is: 49,000.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,315.28 : 90,135.06 = 35,507.28 : x
  2. Step 2: Convert to fraction form
    65,315.28/90,135.06 = 35,507.28/x
  3. Step 3: Cross multiply
    65,315.28x = 90,135.06 × 35,507.28
  4. Step 4: Simplify right side
    65,315.28x = 3,200,450,813.24
  5. Step 5: Solve for x
    x = 3,200,450,813.24/65,315.28
  6. Step 6: Final answer
    x = 49,000.03

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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.