Home / 121,725.84-168,009.72-79,210.56

Finding the Fourth Proportional to 121,725.84, 168,009.72 and 79,210.56

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Solution

The fourth proportional to 121,725.84, 168,009.72 and 79,210.56 is: 109,328.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,725.84 : 168,009.72 = 79,210.56 : x
  2. Step 2: Convert to fraction form
    121,725.84/168,009.72 = 79,210.56/x
  3. Step 3: Cross multiply
    121,725.84x = 168,009.72 × 79,210.56
  4. Step 4: Simplify right side
    121,725.84x = 13,308,144,006.64
  5. Step 5: Solve for x
    x = 13,308,144,006.64/121,725.84
  6. Step 6: Final answer
    x = 109,328.83

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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.