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Finding the Fourth Proportional to 123,815.40, 185,723.10 and 123,815.40

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Solution

The fourth proportional to 123,815.40, 185,723.10 and 123,815.40 is: 185,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,815.40 : 185,723.10 = 123,815.40 : x
  2. Step 2: Convert to fraction form
    123,815.40/185,723.10 = 123,815.40/x
  3. Step 3: Cross multiply
    123,815.40x = 185,723.10 × 123,815.40
  4. Step 4: Simplify right side
    123,815.40x = 22,995,379,915.74
  5. Step 5: Solve for x
    x = 22,995,379,915.74/123,815.40
  6. Step 6: Final answer
    x = 185,723.10

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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.