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Finding the Fourth Proportional to 71,903.68, 99,220.08 and 40,069.60

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Solution

The fourth proportional to 71,903.68, 99,220.08 and 40,069.60 is: 55,292.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,903.68 : 99,220.08 = 40,069.60 : x
  2. Step 2: Convert to fraction form
    71,903.68/99,220.08 = 40,069.60/x
  3. Step 3: Cross multiply
    71,903.68x = 99,220.08 × 40,069.60
  4. Step 4: Simplify right side
    71,903.68x = 3,975,708,917.57
  5. Step 5: Solve for x
    x = 3,975,708,917.57/71,903.68
  6. Step 6: Final answer
    x = 55,292.15

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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.