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Finding the Fourth Proportional to 125,133.86, 172,668.11 and 71,415.68

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Solution

The fourth proportional to 125,133.86, 172,668.11 and 71,415.68 is: 98,544.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,133.86 : 172,668.11 = 71,415.68 : x
  2. Step 2: Convert to fraction form
    125,133.86/172,668.11 = 71,415.68/x
  3. Step 3: Cross multiply
    125,133.86x = 172,668.11 × 71,415.68
  4. Step 4: Simplify right side
    125,133.86x = 12,331,209,269.55
  5. Step 5: Solve for x
    x = 12,331,209,269.55/125,133.86
  6. Step 6: Final answer
    x = 98,544.14

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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.