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Finding the Fourth Proportional to 81,099.96, 111,970.60 and 72,587.34

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Solution

The fourth proportional to 81,099.96, 111,970.60 and 72,587.34 is: 100,217.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,099.96 : 111,970.60 = 72,587.34 : x
  2. Step 2: Convert to fraction form
    81,099.96/111,970.60 = 72,587.34/x
  3. Step 3: Cross multiply
    81,099.96x = 111,970.60 × 72,587.34
  4. Step 4: Simplify right side
    81,099.96x = 8,127,648,012.20
  5. Step 5: Solve for x
    x = 8,127,648,012.20/81,099.96
  6. Step 6: Final answer
    x = 100,217.66

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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.