Home / 312,128.48-430,735.92-168,891.05

Finding the Fourth Proportional to 312,128.48, 430,735.92 and 168,891.05

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Solution

The fourth proportional to 312,128.48, 430,735.92 and 168,891.05 is: 233,068.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,128.48 : 430,735.92 = 168,891.05 : x
  2. Step 2: Convert to fraction form
    312,128.48/430,735.92 = 168,891.05/x
  3. Step 3: Cross multiply
    312,128.48x = 430,735.92 × 168,891.05
  4. Step 4: Simplify right side
    312,128.48x = 72,747,441,801.52
  5. Step 5: Solve for x
    x = 72,747,441,801.52/312,128.48
  6. Step 6: Final answer
    x = 233,068.90

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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.