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Finding the Fourth Proportional to 65,978.70, 98,989.77 and 43,879.02

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Solution

The fourth proportional to 65,978.70, 98,989.77 and 43,879.02 is: 65,832.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,978.70 : 98,989.77 = 43,879.02 : x
  2. Step 2: Convert to fraction form
    65,978.70/98,989.77 = 43,879.02/x
  3. Step 3: Cross multiply
    65,978.70x = 98,989.77 × 43,879.02
  4. Step 4: Simplify right side
    65,978.70x = 4,343,574,097.63
  5. Step 5: Solve for x
    x = 4,343,574,097.63/65,978.70
  6. Step 6: Final answer
    x = 65,832.97

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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.