Home / 129,090.94-178,162.20-72,502.32

Finding the Fourth Proportional to 129,090.94, 178,162.20 and 72,502.32

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Solution

The fourth proportional to 129,090.94, 178,162.20 and 72,502.32 is: 100,062.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,090.94 : 178,162.20 = 72,502.32 : x
  2. Step 2: Convert to fraction form
    129,090.94/178,162.20 = 72,502.32/x
  3. Step 3: Cross multiply
    129,090.94x = 178,162.20 × 72,502.32
  4. Step 4: Simplify right side
    129,090.94x = 12,917,172,836.30
  5. Step 5: Solve for x
    x = 12,917,172,836.30/129,090.94
  6. Step 6: Final answer
    x = 100,062.58

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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.