Home / 129,703.86-178,988.94-73,115.28

Finding the Fourth Proportional to 129,703.86, 178,988.94 and 73,115.28

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Solution

The fourth proportional to 129,703.86, 178,988.94 and 73,115.28 is: 100,897.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,703.86 : 178,988.94 = 73,115.28 : x
  2. Step 2: Convert to fraction form
    129,703.86/178,988.94 = 73,115.28/x
  3. Step 3: Cross multiply
    129,703.86x = 178,988.94 × 73,115.28
  4. Step 4: Simplify right side
    129,703.86x = 13,086,826,465.00
  5. Step 5: Solve for x
    x = 13,086,826,465.00/129,703.86
  6. Step 6: Final answer
    x = 100,897.74

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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.