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Finding the Fourth Proportional to 65,643.40, 98,246.40 and 57,770.20

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Solution

The fourth proportional to 65,643.40, 98,246.40 and 57,770.20 is: 86,462.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,643.40 : 98,246.40 = 57,770.20 : x
  2. Step 2: Convert to fraction form
    65,643.40/98,246.40 = 57,770.20/x
  3. Step 3: Cross multiply
    65,643.40x = 98,246.40 × 57,770.20
  4. Step 4: Simplify right side
    65,643.40x = 5,675,714,177.28
  5. Step 5: Solve for x
    x = 5,675,714,177.28/65,643.40
  6. Step 6: Final answer
    x = 86,462.83

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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.