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Finding the Fourth Proportional to 65,980.80, 98,906.40 and 58,982.40

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Solution

The fourth proportional to 65,980.80, 98,906.40 and 58,982.40 is: 88,415.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,980.80 : 98,906.40 = 58,982.40 : x
  2. Step 2: Convert to fraction form
    65,980.80/98,906.40 = 58,982.40/x
  3. Step 3: Cross multiply
    65,980.80x = 98,906.40 × 58,982.40
  4. Step 4: Simplify right side
    65,980.80x = 5,833,736,847.36
  5. Step 5: Solve for x
    x = 5,833,736,847.36/65,980.80
  6. Step 6: Final answer
    x = 88,415.67

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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.