Home / 99,842.21-137,782.50-54,520.55

Finding the Fourth Proportional to 99,842.21, 137,782.50 and 54,520.55

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Solution

The fourth proportional to 99,842.21, 137,782.50 and 54,520.55 is: 75,238.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,842.21 : 137,782.50 = 54,520.55 : x
  2. Step 2: Convert to fraction form
    99,842.21/137,782.50 = 54,520.55/x
  3. Step 3: Cross multiply
    99,842.21x = 137,782.50 × 54,520.55
  4. Step 4: Simplify right side
    99,842.21x = 7,511,977,680.38
  5. Step 5: Solve for x
    x = 7,511,977,680.38/99,842.21
  6. Step 6: Final answer
    x = 75,238.50

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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.