Home / 65,619.10-98,440.80-21,247.30

Finding the Fourth Proportional to 65,619.10, 98,440.80 and 21,247.30

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Solution

The fourth proportional to 65,619.10, 98,440.80 and 21,247.30 is: 31,874.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,619.10 : 98,440.80 = 21,247.30 : x
  2. Step 2: Convert to fraction form
    65,619.10/98,440.80 = 21,247.30/x
  3. Step 3: Cross multiply
    65,619.10x = 98,440.80 × 21,247.30
  4. Step 4: Simplify right side
    65,619.10x = 2,091,601,209.84
  5. Step 5: Solve for x
    x = 2,091,601,209.84/65,619.10
  6. Step 6: Final answer
    x = 31,874.88

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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.