Home / 120,070.92-165,705.72-79,721.52

Finding the Fourth Proportional to 120,070.92, 165,705.72 and 79,721.52

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Solution

The fourth proportional to 120,070.92, 165,705.72 and 79,721.52 is: 110,020.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,070.92 : 165,705.72 = 79,721.52 : x
  2. Step 2: Convert to fraction form
    120,070.92/165,705.72 = 79,721.52/x
  3. Step 3: Cross multiply
    120,070.92x = 165,705.72 × 79,721.52
  4. Step 4: Simplify right side
    120,070.92x = 13,210,311,871.09
  5. Step 5: Solve for x
    x = 13,210,311,871.09/120,070.92
  6. Step 6: Final answer
    x = 110,020.91

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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.