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Finding the Fourth Proportional to 65,879.28, 98,731.44 and 42,143.04

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Solution

The fourth proportional to 65,879.28, 98,731.44 and 42,143.04 is: 63,158.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,879.28 : 98,731.44 = 42,143.04 : x
  2. Step 2: Convert to fraction form
    65,879.28/98,731.44 = 42,143.04/x
  3. Step 3: Cross multiply
    65,879.28x = 98,731.44 × 42,143.04
  4. Step 4: Simplify right side
    65,879.28x = 4,160,843,025.18
  5. Step 5: Solve for x
    x = 4,160,843,025.18/65,879.28
  6. Step 6: Final answer
    x = 63,158.60

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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.