Home / 129,977.76-179,358.40-76,257.12

Finding the Fourth Proportional to 129,977.76, 179,358.40 and 76,257.12

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Solution

The fourth proportional to 129,977.76, 179,358.40 and 76,257.12 is: 105,228.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,977.76 : 179,358.40 = 76,257.12 : x
  2. Step 2: Convert to fraction form
    129,977.76/179,358.40 = 76,257.12/x
  3. Step 3: Cross multiply
    129,977.76x = 179,358.40 × 76,257.12
  4. Step 4: Simplify right side
    129,977.76x = 13,677,355,031.81
  5. Step 5: Solve for x
    x = 13,677,355,031.81/129,977.76
  6. Step 6: Final answer
    x = 105,228.43

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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.