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Finding the Fourth Proportional to 65,720.48, 98,566.24 and 18,963.20

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Solution

The fourth proportional to 65,720.48, 98,566.24 and 18,963.20 is: 28,440.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,720.48 : 98,566.24 = 18,963.20 : x
  2. Step 2: Convert to fraction form
    65,720.48/98,566.24 = 18,963.20/x
  3. Step 3: Cross multiply
    65,720.48x = 98,566.24 × 18,963.20
  4. Step 4: Simplify right side
    65,720.48x = 1,869,131,322.37
  5. Step 5: Solve for x
    x = 1,869,131,322.37/65,720.48
  6. Step 6: Final answer
    x = 28,440.62

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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.