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Finding the Fourth Proportional to 70,619.31, 97,310.97 and 65,636.60

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Solution

The fourth proportional to 70,619.31, 97,310.97 and 65,636.60 is: 90,444.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,619.31 : 97,310.97 = 65,636.60 : x
  2. Step 2: Convert to fraction form
    70,619.31/97,310.97 = 65,636.60/x
  3. Step 3: Cross multiply
    70,619.31x = 97,310.97 × 65,636.60
  4. Step 4: Simplify right side
    70,619.31x = 6,387,160,726.95
  5. Step 5: Solve for x
    x = 6,387,160,726.95/70,619.31
  6. Step 6: Final answer
    x = 90,444.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.