Home / 257,081.10-385,448.85-137,157.90

Finding the Fourth Proportional to 257,081.10, 385,448.85 and 137,157.90

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Solution

The fourth proportional to 257,081.10, 385,448.85 and 137,157.90 is: 205,644.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,081.10 : 385,448.85 = 137,157.90 : x
  2. Step 2: Convert to fraction form
    257,081.10/385,448.85 = 137,157.90/x
  3. Step 3: Cross multiply
    257,081.10x = 385,448.85 × 137,157.90
  4. Step 4: Simplify right side
    257,081.10x = 52,867,354,823.42
  5. Step 5: Solve for x
    x = 52,867,354,823.42/257,081.10
  6. Step 6: Final answer
    x = 205,644.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.