Home / 122,489.13-168,992.32-77,171.16

Finding the Fourth Proportional to 122,489.13, 168,992.32 and 77,171.16

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Solution

The fourth proportional to 122,489.13, 168,992.32 and 77,171.16 is: 106,469.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,489.13 : 168,992.32 = 77,171.16 : x
  2. Step 2: Convert to fraction form
    122,489.13/168,992.32 = 77,171.16/x
  3. Step 3: Cross multiply
    122,489.13x = 168,992.32 × 77,171.16
  4. Step 4: Simplify right side
    122,489.13x = 13,041,333,365.49
  5. Step 5: Solve for x
    x = 13,041,333,365.49/122,489.13
  6. Step 6: Final answer
    x = 106,469.31

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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.