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Finding the Fourth Proportional to 129,807, 179,133.66 and 70,191

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Solution

The fourth proportional to 129,807, 179,133.66 and 70,191 is: 96,863.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,807 : 179,133.66 = 70,191 : x
  2. Step 2: Convert to fraction form
    129,807/179,133.66 = 70,191/x
  3. Step 3: Cross multiply
    129,807x = 179,133.66 × 70,191
  4. Step 4: Simplify right side
    129,807x = 12,573,570,729.06
  5. Step 5: Solve for x
    x = 12,573,570,729.06/129,807
  6. Step 6: Final answer
    x = 96,863.58

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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.