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Finding the Fourth Proportional to 125,190.37, 172,668.47 and 86,949.97

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Solution

The fourth proportional to 125,190.37, 172,668.47 and 86,949.97 is: 119,925.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,190.37 : 172,668.47 = 86,949.97 : x
  2. Step 2: Convert to fraction form
    125,190.37/172,668.47 = 86,949.97/x
  3. Step 3: Cross multiply
    125,190.37x = 172,668.47 × 86,949.97
  4. Step 4: Simplify right side
    125,190.37x = 15,013,518,286.45
  5. Step 5: Solve for x
    x = 15,013,518,286.45/125,190.37
  6. Step 6: Final answer
    x = 119,925.50

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1.5x scale

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.