Home / 129,529.24-178,759.46-72,172.28

Finding the Fourth Proportional to 129,529.24, 178,759.46 and 72,172.28

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Solution

The fourth proportional to 129,529.24, 178,759.46 and 72,172.28 is: 99,602.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,529.24 : 178,759.46 = 72,172.28 : x
  2. Step 2: Convert to fraction form
    129,529.24/178,759.46 = 72,172.28/x
  3. Step 3: Cross multiply
    129,529.24x = 178,759.46 × 72,172.28
  4. Step 4: Simplify right side
    129,529.24x = 12,901,477,799.77
  5. Step 5: Solve for x
    x = 12,901,477,799.77/129,529.24
  6. Step 6: Final answer
    x = 99,602.82

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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.