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Finding the Fourth Proportional to 125,137.40, 172,704.77 and 70,691.87

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Solution

The fourth proportional to 125,137.40, 172,704.77 and 70,691.87 is: 97,563.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,137.40 : 172,704.77 = 70,691.87 : x
  2. Step 2: Convert to fraction form
    125,137.40/172,704.77 = 70,691.87/x
  3. Step 3: Cross multiply
    125,137.40x = 172,704.77 × 70,691.87
  4. Step 4: Simplify right side
    125,137.40x = 12,208,823,149.22
  5. Step 5: Solve for x
    x = 12,208,823,149.22/125,137.40
  6. Step 6: Final answer
    x = 97,563.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.