Home / 129,288.28-178,423.62-107,741.98

Finding the Fourth Proportional to 129,288.28, 178,423.62 and 107,741.98

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Solution

The fourth proportional to 129,288.28, 178,423.62 and 107,741.98 is: 148,688.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,288.28 : 178,423.62 = 107,741.98 : x
  2. Step 2: Convert to fraction form
    129,288.28/178,423.62 = 107,741.98/x
  3. Step 3: Cross multiply
    129,288.28x = 178,423.62 × 107,741.98
  4. Step 4: Simplify right side
    129,288.28x = 19,223,714,097.57
  5. Step 5: Solve for x
    x = 19,223,714,097.57/129,288.28
  6. Step 6: Final answer
    x = 148,688.76

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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.