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Finding the Fourth Proportional to 70,909.26, 97,856.83 and 39,080.21

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Solution

The fourth proportional to 70,909.26, 97,856.83 and 39,080.21 is: 53,931.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,909.26 : 97,856.83 = 39,080.21 : x
  2. Step 2: Convert to fraction form
    70,909.26/97,856.83 = 39,080.21/x
  3. Step 3: Cross multiply
    70,909.26x = 97,856.83 × 39,080.21
  4. Step 4: Simplify right side
    70,909.26x = 3,824,265,466.33
  5. Step 5: Solve for x
    x = 3,824,265,466.33/70,909.26
  6. Step 6: Final answer
    x = 53,931.82

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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.