Home / 987,123.30-1,385,121.90-987,123.30

Finding the Fourth Proportional to 987,123.30, 1,385,121.90 and 987,123.30

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Solution

The fourth proportional to 987,123.30, 1,385,121.90 and 987,123.30 is: 1,385,121.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,123.30 : 1,385,121.90 = 987,123.30 : x
  2. Step 2: Convert to fraction form
    987,123.30/1,385,121.90 = 987,123.30/x
  3. Step 3: Cross multiply
    987,123.30x = 1,385,121.90 × 987,123.30
  4. Step 4: Simplify right side
    987,123.30x = 1,367,286,100,830.27
  5. Step 5: Solve for x
    x = 1,367,286,100,830.27/987,123.30
  6. Step 6: Final answer
    x = 1,385,121.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.