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Finding the Fourth Proportional to 125,894.21, 173,723.42 and 72,166.91

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Solution

The fourth proportional to 125,894.21, 173,723.42 and 72,166.91 is: 99,584.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,894.21 : 173,723.42 = 72,166.91 : x
  2. Step 2: Convert to fraction form
    125,894.21/173,723.42 = 72,166.91/x
  3. Step 3: Cross multiply
    125,894.21x = 173,723.42 × 72,166.91
  4. Step 4: Simplify right side
    125,894.21x = 12,537,082,055.20
  5. Step 5: Solve for x
    x = 12,537,082,055.20/125,894.21
  6. Step 6: Final answer
    x = 99,584.26

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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.