Home / 312,179.74-430,808-168,939.76

Finding the Fourth Proportional to 312,179.74, 430,808 and 168,939.76

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Solution

The fourth proportional to 312,179.74, 430,808 and 168,939.76 is: 233,136.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,179.74 : 430,808 = 168,939.76 : x
  2. Step 2: Convert to fraction form
    312,179.74/430,808 = 168,939.76/x
  3. Step 3: Cross multiply
    312,179.74x = 430,808 × 168,939.76
  4. Step 4: Simplify right side
    312,179.74x = 72,780,600,126.08
  5. Step 5: Solve for x
    x = 72,780,600,126.08/312,179.74
  6. Step 6: Final answer
    x = 233,136.85

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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.