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Finding the Fourth Proportional to 71,808.46, 99,107.51 and 54,780.55

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Solution

The fourth proportional to 71,808.46, 99,107.51 and 54,780.55 is: 75,606.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,808.46 : 99,107.51 = 54,780.55 : x
  2. Step 2: Convert to fraction form
    71,808.46/99,107.51 = 54,780.55/x
  3. Step 3: Cross multiply
    71,808.46x = 99,107.51 × 54,780.55
  4. Step 4: Simplify right side
    71,808.46x = 5,429,163,633.03
  5. Step 5: Solve for x
    x = 5,429,163,633.03/71,808.46
  6. Step 6: Final answer
    x = 75,606.18

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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.