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Finding the Fourth Proportional to 123,408.40, 172,564.40 and 123,408.40

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Solution

The fourth proportional to 123,408.40, 172,564.40 and 123,408.40 is: 172,564.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,408.40 : 172,564.40 = 123,408.40 : x
  2. Step 2: Convert to fraction form
    123,408.40/172,564.40 = 123,408.40/x
  3. Step 3: Cross multiply
    123,408.40x = 172,564.40 × 123,408.40
  4. Step 4: Simplify right side
    123,408.40x = 21,295,896,500.96
  5. Step 5: Solve for x
    x = 21,295,896,500.96/123,408.40
  6. Step 6: Final answer
    x = 172,564.40

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1.5x scale

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.