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Finding the Fourth Proportional to 65,490.60, 98,250.30 and 21,109.80

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Solution

The fourth proportional to 65,490.60, 98,250.30 and 21,109.80 is: 31,669.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,490.60 : 98,250.30 = 21,109.80 : x
  2. Step 2: Convert to fraction form
    65,490.60/98,250.30 = 21,109.80/x
  3. Step 3: Cross multiply
    65,490.60x = 98,250.30 × 21,109.80
  4. Step 4: Simplify right side
    65,490.60x = 2,074,044,182.94
  5. Step 5: Solve for x
    x = 2,074,044,182.94/65,490.60
  6. Step 6: Final answer
    x = 31,669.34

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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.