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Finding the Fourth Proportional to 71,809.80, 99,090 and 41,604.90

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Solution

The fourth proportional to 71,809.80, 99,090 and 41,604.90 is: 57,410.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,809.80 : 99,090 = 41,604.90 : x
  2. Step 2: Convert to fraction form
    71,809.80/99,090 = 41,604.90/x
  3. Step 3: Cross multiply
    71,809.80x = 99,090 × 41,604.90
  4. Step 4: Simplify right side
    71,809.80x = 4,122,629,541
  5. Step 5: Solve for x
    x = 4,122,629,541/71,809.80
  6. Step 6: Final answer
    x = 57,410.40

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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.