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Finding the Fourth Proportional to 71,531.70, 98,682.93 and 43,221

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Solution

The fourth proportional to 71,531.70, 98,682.93 and 43,221 is: 59,626.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,531.70 : 98,682.93 = 43,221 : x
  2. Step 2: Convert to fraction form
    71,531.70/98,682.93 = 43,221/x
  3. Step 3: Cross multiply
    71,531.70x = 98,682.93 × 43,221
  4. Step 4: Simplify right side
    71,531.70x = 4,265,174,917.53
  5. Step 5: Solve for x
    x = 4,265,174,917.53/71,531.70
  6. Step 6: Final answer
    x = 59,626.36

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1.5x scale

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.