Home / 129,272.04-178,412.43-72,694.32

Finding the Fourth Proportional to 129,272.04, 178,412.43 and 72,694.32

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Solution

The fourth proportional to 129,272.04, 178,412.43 and 72,694.32 is: 100,327.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,272.04 : 178,412.43 = 72,694.32 : x
  2. Step 2: Convert to fraction form
    129,272.04/178,412.43 = 72,694.32/x
  3. Step 3: Cross multiply
    129,272.04x = 178,412.43 × 72,694.32
  4. Step 4: Simplify right side
    129,272.04x = 12,969,570,278.40
  5. Step 5: Solve for x
    x = 12,969,570,278.40/129,272.04
  6. Step 6: Final answer
    x = 100,327.73

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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.