Home / 129,102.36-178,109.23-78,026.42

Finding the Fourth Proportional to 129,102.36, 178,109.23 and 78,026.42

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Solution

The fourth proportional to 129,102.36, 178,109.23 and 78,026.42 is: 107,645.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,102.36 : 178,109.23 = 78,026.42 : x
  2. Step 2: Convert to fraction form
    129,102.36/178,109.23 = 78,026.42/x
  3. Step 3: Cross multiply
    129,102.36x = 178,109.23 × 78,026.42
  4. Step 4: Simplify right side
    129,102.36x = 13,897,225,585.86
  5. Step 5: Solve for x
    x = 13,897,225,585.86/129,102.36
  6. Step 6: Final answer
    x = 107,645.02

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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.