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Finding the Fourth Proportional to 123,031.90, 172,361.30 and 123,031.90

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Solution

The fourth proportional to 123,031.90, 172,361.30 and 123,031.90 is: 172,361.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,031.90 : 172,361.30 = 123,031.90 : x
  2. Step 2: Convert to fraction form
    123,031.90/172,361.30 = 123,031.90/x
  3. Step 3: Cross multiply
    123,031.90x = 172,361.30 × 123,031.90
  4. Step 4: Simplify right side
    123,031.90x = 21,205,938,225.47
  5. Step 5: Solve for x
    x = 21,205,938,225.47/123,031.90
  6. Step 6: Final answer
    x = 172,361.30

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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.