Home / 121,768.10-168,091.72-74,036.70

Finding the Fourth Proportional to 121,768.10, 168,091.72 and 74,036.70

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Solution

The fourth proportional to 121,768.10, 168,091.72 and 74,036.70 is: 102,202.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,768.10 : 168,091.72 = 74,036.70 : x
  2. Step 2: Convert to fraction form
    121,768.10/168,091.72 = 74,036.70/x
  3. Step 3: Cross multiply
    121,768.10x = 168,091.72 × 74,036.70
  4. Step 4: Simplify right side
    121,768.10x = 12,444,956,246.12
  5. Step 5: Solve for x
    x = 12,444,956,246.12/121,768.10
  6. Step 6: Final answer
    x = 102,202.11

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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.