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Finding the Fourth Proportional to 129,698.88, 194,385.92 and 69,578.88

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Solution

The fourth proportional to 129,698.88, 194,385.92 and 69,578.88 is: 104,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,698.88 : 194,385.92 = 69,578.88 : x
  2. Step 2: Convert to fraction form
    129,698.88/194,385.92 = 69,578.88/x
  3. Step 3: Cross multiply
    129,698.88x = 194,385.92 × 69,578.88
  4. Step 4: Simplify right side
    129,698.88x = 13,525,154,601.37
  5. Step 5: Solve for x
    x = 13,525,154,601.37/129,698.88
  6. Step 6: Final answer
    x = 104,281.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.