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Finding the Fourth Proportional to 57,543.64, 86,320.16 and 15,990.64

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Solution

The fourth proportional to 57,543.64, 86,320.16 and 15,990.64 is: 23,987.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,543.64 : 86,320.16 = 15,990.64 : x
  2. Step 2: Convert to fraction form
    57,543.64/86,320.16 = 15,990.64/x
  3. Step 3: Cross multiply
    57,543.64x = 86,320.16 × 15,990.64
  4. Step 4: Simplify right side
    57,543.64x = 1,380,314,603.30
  5. Step 5: Solve for x
    x = 1,380,314,603.30/57,543.64
  6. Step 6: Final answer
    x = 23,987.27

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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.