Home / 129,496.12-178,704.42-72,907.72

Finding the Fourth Proportional to 129,496.12, 178,704.42 and 72,907.72

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Solution

The fourth proportional to 129,496.12, 178,704.42 and 72,907.72 is: 100,612.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,496.12 : 178,704.42 = 72,907.72 : x
  2. Step 2: Convert to fraction form
    129,496.12/178,704.42 = 72,907.72/x
  3. Step 3: Cross multiply
    129,496.12x = 178,704.42 × 72,907.72
  4. Step 4: Simplify right side
    129,496.12x = 13,028,931,816.12
  5. Step 5: Solve for x
    x = 13,028,931,816.12/129,496.12
  6. Step 6: Final answer
    x = 100,612.53

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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.