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Finding the Fourth Proportional to 129,812, 179,140.57 and 70,196

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Solution

The fourth proportional to 129,812, 179,140.57 and 70,196 is: 96,870.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,812 : 179,140.57 = 70,196 : x
  2. Step 2: Convert to fraction form
    129,812/179,140.57 = 70,196/x
  3. Step 3: Cross multiply
    129,812x = 179,140.57 × 70,196
  4. Step 4: Simplify right side
    129,812x = 12,574,951,451.72
  5. Step 5: Solve for x
    x = 12,574,951,451.72/129,812
  6. Step 6: Final answer
    x = 96,870.49

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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.