Home / 129,011.05-178,035.24-72,422.38

Finding the Fourth Proportional to 129,011.05, 178,035.24 and 72,422.38

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Solution

The fourth proportional to 129,011.05, 178,035.24 and 72,422.38 is: 99,942.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,011.05 : 178,035.24 = 72,422.38 : x
  2. Step 2: Convert to fraction form
    129,011.05/178,035.24 = 72,422.38/x
  3. Step 3: Cross multiply
    129,011.05x = 178,035.24 × 72,422.38
  4. Step 4: Simplify right side
    129,011.05x = 12,893,735,804.67
  5. Step 5: Solve for x
    x = 12,893,735,804.67/129,011.05
  6. Step 6: Final answer
    x = 99,942.88

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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.