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Finding the Fourth Proportional to 65,608.86, 98,428.92 and 21,235.62

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Solution

The fourth proportional to 65,608.86, 98,428.92 and 21,235.62 is: 31,858.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,608.86 : 98,428.92 = 21,235.62 : x
  2. Step 2: Convert to fraction form
    65,608.86/98,428.92 = 21,235.62/x
  3. Step 3: Cross multiply
    65,608.86x = 98,428.92 × 21,235.62
  4. Step 4: Simplify right side
    65,608.86x = 2,090,199,142.13
  5. Step 5: Solve for x
    x = 2,090,199,142.13/65,608.86
  6. Step 6: Final answer
    x = 31,858.49

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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.