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Finding the Fourth Proportional to 65,616.76, 98,440.73 and 21,243.49

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Solution

The fourth proportional to 65,616.76, 98,440.73 and 21,243.49 is: 31,870.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,616.76 : 98,440.73 = 21,243.49 : x
  2. Step 2: Convert to fraction form
    65,616.76/98,440.73 = 21,243.49/x
  3. Step 3: Cross multiply
    65,616.76x = 98,440.73 × 21,243.49
  4. Step 4: Simplify right side
    65,616.76x = 2,091,224,663.35
  5. Step 5: Solve for x
    x = 2,091,224,663.35/65,616.76
  6. Step 6: Final answer
    x = 31,870.28

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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.