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Finding the Fourth Proportional to 65,637.60, 98,470.80 and 21,256.80

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Solution

The fourth proportional to 65,637.60, 98,470.80 and 21,256.80 is: 31,889.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,637.60 : 98,470.80 = 21,256.80 : x
  2. Step 2: Convert to fraction form
    65,637.60/98,470.80 = 21,256.80/x
  3. Step 3: Cross multiply
    65,637.60x = 98,470.80 × 21,256.80
  4. Step 4: Simplify right side
    65,637.60x = 2,093,174,101.44
  5. Step 5: Solve for x
    x = 2,093,174,101.44/65,637.60
  6. Step 6: Final answer
    x = 31,889.86

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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.