Home / 129,448.26-178,617.74-72,086.90

Finding the Fourth Proportional to 129,448.26, 178,617.74 and 72,086.90

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Solution

The fourth proportional to 129,448.26, 178,617.74 and 72,086.90 is: 99,468.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,448.26 : 178,617.74 = 72,086.90 : x
  2. Step 2: Convert to fraction form
    129,448.26/178,617.74 = 72,086.90/x
  3. Step 3: Cross multiply
    129,448.26x = 178,617.74 × 72,086.90
  4. Step 4: Simplify right side
    129,448.26x = 12,875,997,908.08
  5. Step 5: Solve for x
    x = 12,875,997,908.08/129,448.26
  6. Step 6: Final answer
    x = 99,468.30

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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.