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Finding the Fourth Proportional to 65,428.60, 90,284.70 and 36,751.48

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Solution

The fourth proportional to 65,428.60, 90,284.70 and 36,751.48 is: 50,713.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,428.60 : 90,284.70 = 36,751.48 : x
  2. Step 2: Convert to fraction form
    65,428.60/90,284.70 = 36,751.48/x
  3. Step 3: Cross multiply
    65,428.60x = 90,284.70 × 36,751.48
  4. Step 4: Simplify right side
    65,428.60x = 3,318,096,346.36
  5. Step 5: Solve for x
    x = 3,318,096,346.36/65,428.60
  6. Step 6: Final answer
    x = 50,713.24

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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.