Home / 129,530.16-178,755.12-72,943.56

Finding the Fourth Proportional to 129,530.16, 178,755.12 and 72,943.56

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Solution

The fourth proportional to 129,530.16, 178,755.12 and 72,943.56 is: 100,664.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,530.16 : 178,755.12 = 72,943.56 : x
  2. Step 2: Convert to fraction form
    129,530.16/178,755.12 = 72,943.56/x
  3. Step 3: Cross multiply
    129,530.16x = 178,755.12 × 72,943.56
  4. Step 4: Simplify right side
    129,530.16x = 13,039,034,821.03
  5. Step 5: Solve for x
    x = 13,039,034,821.03/129,530.16
  6. Step 6: Final answer
    x = 100,664.08

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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.