Home / 129,880.40-179,233.23-72,520.70

Finding the Fourth Proportional to 129,880.40, 179,233.23 and 72,520.70

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Solution

The fourth proportional to 129,880.40, 179,233.23 and 72,520.70 is: 100,077.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,880.40 : 179,233.23 = 72,520.70 : x
  2. Step 2: Convert to fraction form
    129,880.40/179,233.23 = 72,520.70/x
  3. Step 3: Cross multiply
    129,880.40x = 179,233.23 × 72,520.70
  4. Step 4: Simplify right side
    129,880.40x = 12,998,118,406.69
  5. Step 5: Solve for x
    x = 12,998,118,406.69/129,880.40
  6. Step 6: Final answer
    x = 100,077.60

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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.