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Finding the Fourth Proportional to 65,728.76, 98,553.72 and 30,145.51

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Solution

The fourth proportional to 65,728.76, 98,553.72 and 30,145.51 is: 45,200.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,728.76 : 98,553.72 = 30,145.51 : x
  2. Step 2: Convert to fraction form
    65,728.76/98,553.72 = 30,145.51/x
  3. Step 3: Cross multiply
    65,728.76x = 98,553.72 × 30,145.51
  4. Step 4: Simplify right side
    65,728.76x = 2,970,952,388.04
  5. Step 5: Solve for x
    x = 2,970,952,388.04/65,728.76
  6. Step 6: Final answer
    x = 45,200.19

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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.