Home / 129,385.20-178,538.88-72,795.36

Finding the Fourth Proportional to 129,385.20, 178,538.88 and 72,795.36

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Solution

The fourth proportional to 129,385.20, 178,538.88 and 72,795.36 is: 100,450.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,385.20 : 178,538.88 = 72,795.36 : x
  2. Step 2: Convert to fraction form
    129,385.20/178,538.88 = 72,795.36/x
  3. Step 3: Cross multiply
    129,385.20x = 178,538.88 × 72,795.36
  4. Step 4: Simplify right side
    129,385.20x = 12,996,802,043.60
  5. Step 5: Solve for x
    x = 12,996,802,043.60/129,385.20
  6. Step 6: Final answer
    x = 100,450.45

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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.