Home / 257,221.80-385,890.30-99,436.20

Finding the Fourth Proportional to 257,221.80, 385,890.30 and 99,436.20

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Solution

The fourth proportional to 257,221.80, 385,890.30 and 99,436.20 is: 149,176.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,221.80 : 385,890.30 = 99,436.20 : x
  2. Step 2: Convert to fraction form
    257,221.80/385,890.30 = 99,436.20/x
  3. Step 3: Cross multiply
    257,221.80x = 385,890.30 × 99,436.20
  4. Step 4: Simplify right side
    257,221.80x = 38,371,465,048.86
  5. Step 5: Solve for x
    x = 38,371,465,048.86/257,221.80
  6. Step 6: Final answer
    x = 149,176.57

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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.