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Finding the Fourth Proportional to 65,985.96, 98,978.82 and 18,600.96

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Solution

The fourth proportional to 65,985.96, 98,978.82 and 18,600.96 is: 27,901.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,985.96 : 98,978.82 = 18,600.96 : x
  2. Step 2: Convert to fraction form
    65,985.96/98,978.82 = 18,600.96/x
  3. Step 3: Cross multiply
    65,985.96x = 98,978.82 × 18,600.96
  4. Step 4: Simplify right side
    65,985.96x = 1,841,101,071.67
  5. Step 5: Solve for x
    x = 1,841,101,071.67/65,985.96
  6. Step 6: Final answer
    x = 27,901.41

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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.