Home / 129,256.01-178,389.92-72,678.32

Finding the Fourth Proportional to 129,256.01, 178,389.92 and 72,678.32

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Solution

The fourth proportional to 129,256.01, 178,389.92 and 72,678.32 is: 100,305.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,256.01 : 178,389.92 = 72,678.32 : x
  2. Step 2: Convert to fraction form
    129,256.01/178,389.92 = 72,678.32/x
  3. Step 3: Cross multiply
    129,256.01x = 178,389.92 × 72,678.32
  4. Step 4: Simplify right side
    129,256.01x = 12,965,079,327.14
  5. Step 5: Solve for x
    x = 12,965,079,327.14/129,256.01
  6. Step 6: Final answer
    x = 100,305.43

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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.