Home / 129,129.19-178,186.04-119,607.54

Finding the Fourth Proportional to 129,129.19, 178,186.04 and 119,607.54

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Solution

The fourth proportional to 129,129.19, 178,186.04 and 119,607.54 is: 165,047.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,129.19 : 178,186.04 = 119,607.54 : x
  2. Step 2: Convert to fraction form
    129,129.19/178,186.04 = 119,607.54/x
  3. Step 3: Cross multiply
    129,129.19x = 178,186.04 × 119,607.54
  4. Step 4: Simplify right side
    129,129.19x = 21,312,393,906.74
  5. Step 5: Solve for x
    x = 21,312,393,906.74/129,129.19
  6. Step 6: Final answer
    x = 165,047.06

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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.