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Finding the Fourth Proportional to 129,826, 179,160.42 and 70,210

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Solution

The fourth proportional to 129,826, 179,160.42 and 70,210 is: 96,890.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,826 : 179,160.42 = 70,210 : x
  2. Step 2: Convert to fraction form
    129,826/179,160.42 = 70,210/x
  3. Step 3: Cross multiply
    129,826x = 179,160.42 × 70,210
  4. Step 4: Simplify right side
    129,826x = 12,578,853,088.20
  5. Step 5: Solve for x
    x = 12,578,853,088.20/129,826
  6. Step 6: Final answer
    x = 96,890.09

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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.