Home / 129,729.84-194,479.40-69,790.50

Finding the Fourth Proportional to 129,729.84, 194,479.40 and 69,790.50

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Solution

The fourth proportional to 129,729.84, 194,479.40 and 69,790.50 is: 104,623.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,729.84 : 194,479.40 = 69,790.50 : x
  2. Step 2: Convert to fraction form
    129,729.84/194,479.40 = 69,790.50/x
  3. Step 3: Cross multiply
    129,729.84x = 194,479.40 × 69,790.50
  4. Step 4: Simplify right side
    129,729.84x = 13,572,814,216.75
  5. Step 5: Solve for x
    x = 13,572,814,216.75/129,729.84
  6. Step 6: Final answer
    x = 104,623.69

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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.