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Finding the Fourth Proportional to 129,984, 179,377.92 and 70,368

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Solution

The fourth proportional to 129,984, 179,377.92 and 70,368 is: 97,107.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,984 : 179,377.92 = 70,368 : x
  2. Step 2: Convert to fraction form
    129,984/179,377.92 = 70,368/x
  3. Step 3: Cross multiply
    129,984x = 179,377.92 × 70,368
  4. Step 4: Simplify right side
    129,984x = 12,622,465,474.56
  5. Step 5: Solve for x
    x = 12,622,465,474.56/129,984
  6. Step 6: Final answer
    x = 97,107.84

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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.