Home / 121,923.87-168,248.16-68,198.51

Finding the Fourth Proportional to 121,923.87, 168,248.16 and 68,198.51

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Solution

The fourth proportional to 121,923.87, 168,248.16 and 68,198.51 is: 94,110.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,923.87 : 168,248.16 = 68,198.51 : x
  2. Step 2: Convert to fraction form
    121,923.87/168,248.16 = 68,198.51/x
  3. Step 3: Cross multiply
    121,923.87x = 168,248.16 × 68,198.51
  4. Step 4: Simplify right side
    121,923.87x = 11,474,272,981.00
  5. Step 5: Solve for x
    x = 11,474,272,981.00/121,923.87
  6. Step 6: Final answer
    x = 94,110.14

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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.