Home / 129,450.51-178,620.84-72,089.15

Finding the Fourth Proportional to 129,450.51, 178,620.84 and 72,089.15

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Solution

The fourth proportional to 129,450.51, 178,620.84 and 72,089.15 is: 99,471.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,450.51 : 178,620.84 = 72,089.15 : x
  2. Step 2: Convert to fraction form
    129,450.51/178,620.84 = 72,089.15/x
  3. Step 3: Cross multiply
    129,450.51x = 178,620.84 × 72,089.15
  4. Step 4: Simplify right side
    129,450.51x = 12,876,623,634.78
  5. Step 5: Solve for x
    x = 12,876,623,634.78/129,450.51
  6. Step 6: Final answer
    x = 99,471.40

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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.