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Finding the Fourth Proportional to 65,779.20, 98,380.80 and 58,809.60

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Solution

The fourth proportional to 65,779.20, 98,380.80 and 58,809.60 is: 87,956.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,779.20 : 98,380.80 = 58,809.60 : x
  2. Step 2: Convert to fraction form
    65,779.20/98,380.80 = 58,809.60/x
  3. Step 3: Cross multiply
    65,779.20x = 98,380.80 × 58,809.60
  4. Step 4: Simplify right side
    65,779.20x = 5,785,735,495.68
  5. Step 5: Solve for x
    x = 5,785,735,495.68/65,779.20
  6. Step 6: Final answer
    x = 87,956.91

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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.