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Finding the Fourth Proportional to 125,058.50, 172,597.20 and 71,331.20

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Solution

The fourth proportional to 125,058.50, 172,597.20 and 71,331.20 is: 98,446.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,058.50 : 172,597.20 = 71,331.20 : x
  2. Step 2: Convert to fraction form
    125,058.50/172,597.20 = 71,331.20/x
  3. Step 3: Cross multiply
    125,058.50x = 172,597.20 × 71,331.20
  4. Step 4: Simplify right side
    125,058.50x = 12,311,565,392.64
  5. Step 5: Solve for x
    x = 12,311,565,392.64/125,058.50
  6. Step 6: Final answer
    x = 98,446.45

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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.