Home / 129,135.06-178,196.76-72,535.50

Finding the Fourth Proportional to 129,135.06, 178,196.76 and 72,535.50

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Solution

The fourth proportional to 129,135.06, 178,196.76 and 72,535.50 is: 100,093.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,135.06 : 178,196.76 = 72,535.50 : x
  2. Step 2: Convert to fraction form
    129,135.06/178,196.76 = 72,535.50/x
  3. Step 3: Cross multiply
    129,135.06x = 178,196.76 × 72,535.50
  4. Step 4: Simplify right side
    129,135.06x = 12,925,591,084.98
  5. Step 5: Solve for x
    x = 12,925,591,084.98/129,135.06
  6. Step 6: Final answer
    x = 100,093.58

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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.