Home / 143,106.89-197,479.79-79,440.59

Finding the Fourth Proportional to 143,106.89, 197,479.79 and 79,440.59

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Solution

The fourth proportional to 143,106.89, 197,479.79 and 79,440.59 is: 109,623.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,106.89 : 197,479.79 = 79,440.59 : x
  2. Step 2: Convert to fraction form
    143,106.89/197,479.79 = 79,440.59/x
  3. Step 3: Cross multiply
    143,106.89x = 197,479.79 × 79,440.59
  4. Step 4: Simplify right side
    143,106.89x = 15,687,911,030.68
  5. Step 5: Solve for x
    x = 15,687,911,030.68/143,106.89
  6. Step 6: Final answer
    x = 109,623.73

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1.5x scale

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.