Home / 142,785.94-197,039.64-79,129.66

Finding the Fourth Proportional to 142,785.94, 197,039.64 and 79,129.66

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Solution

The fourth proportional to 142,785.94, 197,039.64 and 79,129.66 is: 109,196.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,785.94 : 197,039.64 = 79,129.66 : x
  2. Step 2: Convert to fraction form
    142,785.94/197,039.64 = 79,129.66/x
  3. Step 3: Cross multiply
    142,785.94x = 197,039.64 × 79,129.66
  4. Step 4: Simplify right side
    142,785.94x = 15,591,679,719.72
  5. Step 5: Solve for x
    x = 15,591,679,719.72/142,785.94
  6. Step 6: Final answer
    x = 109,196.18

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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.