Home / 129,059.37-178,082.69-72,459.81

Finding the Fourth Proportional to 129,059.37, 178,082.69 and 72,459.81

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Solution

The fourth proportional to 129,059.37, 178,082.69 and 72,459.81 is: 99,983.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,059.37 : 178,082.69 = 72,459.81 : x
  2. Step 2: Convert to fraction form
    129,059.37/178,082.69 = 72,459.81/x
  3. Step 3: Cross multiply
    129,059.37x = 178,082.69 × 72,459.81
  4. Step 4: Simplify right side
    129,059.37x = 12,903,837,519.39
  5. Step 5: Solve for x
    x = 12,903,837,519.39/129,059.37
  6. Step 6: Final answer
    x = 99,983.73

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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.