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Finding the Fourth Proportional to 65,937.32, 98,921.54 and 21,563.90

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Solution

The fourth proportional to 65,937.32, 98,921.54 and 21,563.90 is: 32,350.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,937.32 : 98,921.54 = 21,563.90 : x
  2. Step 2: Convert to fraction form
    65,937.32/98,921.54 = 21,563.90/x
  3. Step 3: Cross multiply
    65,937.32x = 98,921.54 × 21,563.90
  4. Step 4: Simplify right side
    65,937.32x = 2,133,134,196.41
  5. Step 5: Solve for x
    x = 2,133,134,196.41/65,937.32
  6. Step 6: Final answer
    x = 32,350.94

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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.