Home / 129,418.69-178,599.07-72,058.81

Finding the Fourth Proportional to 129,418.69, 178,599.07 and 72,058.81

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Solution

The fourth proportional to 129,418.69, 178,599.07 and 72,058.81 is: 99,441.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,418.69 : 178,599.07 = 72,058.81 : x
  2. Step 2: Convert to fraction form
    129,418.69/178,599.07 = 72,058.81/x
  3. Step 3: Cross multiply
    129,418.69x = 178,599.07 × 72,058.81
  4. Step 4: Simplify right side
    129,418.69x = 12,869,636,451.31
  5. Step 5: Solve for x
    x = 12,869,636,451.31/129,418.69
  6. Step 6: Final answer
    x = 99,441.87

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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.