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Finding the Fourth Proportional to 71,988.75, 99,355.41 and 43,688.97

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Solution

The fourth proportional to 71,988.75, 99,355.41 and 43,688.97 is: 60,297.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,988.75 : 99,355.41 = 43,688.97 : x
  2. Step 2: Convert to fraction form
    71,988.75/99,355.41 = 43,688.97/x
  3. Step 3: Cross multiply
    71,988.75x = 99,355.41 × 43,688.97
  4. Step 4: Simplify right side
    71,988.75x = 4,340,735,526.83
  5. Step 5: Solve for x
    x = 4,340,735,526.83/71,988.75
  6. Step 6: Final answer
    x = 60,297.41

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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.