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Finding the Fourth Proportional to 65,220.80, 97,821.60 and 18,478.40

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Solution

The fourth proportional to 65,220.80, 97,821.60 and 18,478.40 is: 27,714.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,220.80 : 97,821.60 = 18,478.40 : x
  2. Step 2: Convert to fraction form
    65,220.80/97,821.60 = 18,478.40/x
  3. Step 3: Cross multiply
    65,220.80x = 97,821.60 × 18,478.40
  4. Step 4: Simplify right side
    65,220.80x = 1,807,586,653.44
  5. Step 5: Solve for x
    x = 1,807,586,653.44/65,220.80
  6. Step 6: Final answer
    x = 27,714.88

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1.5x scale

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.