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Finding the Fourth Proportional to 129,771, 179,083.98 and 70,155

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Solution

The fourth proportional to 129,771, 179,083.98 and 70,155 is: 96,813.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,771 : 179,083.98 = 70,155 : x
  2. Step 2: Convert to fraction form
    129,771/179,083.98 = 70,155/x
  3. Step 3: Cross multiply
    129,771x = 179,083.98 × 70,155
  4. Step 4: Simplify right side
    129,771x = 12,563,636,616.90
  5. Step 5: Solve for x
    x = 12,563,636,616.90/129,771
  6. Step 6: Final answer
    x = 96,813.90

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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.