Home / 129,707.61-178,994.12-73,119.03

Finding the Fourth Proportional to 129,707.61, 178,994.12 and 73,119.03

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Solution

The fourth proportional to 129,707.61, 178,994.12 and 73,119.03 is: 100,902.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,707.61 : 178,994.12 = 73,119.03 : x
  2. Step 2: Convert to fraction form
    129,707.61/178,994.12 = 73,119.03/x
  3. Step 3: Cross multiply
    129,707.61x = 178,994.12 × 73,119.03
  4. Step 4: Simplify right side
    129,707.61x = 13,087,876,064.51
  5. Step 5: Solve for x
    x = 13,087,876,064.51/129,707.61
  6. Step 6: Final answer
    x = 100,902.92

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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.