Home / 231,884.90-320,000.45-128,525.70

Finding the Fourth Proportional to 231,884.90, 320,000.45 and 128,525.70

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Solution

The fourth proportional to 231,884.90, 320,000.45 and 128,525.70 is: 177,365.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,884.90 : 320,000.45 = 128,525.70 : x
  2. Step 2: Convert to fraction form
    231,884.90/320,000.45 = 128,525.70/x
  3. Step 3: Cross multiply
    231,884.90x = 320,000.45 × 128,525.70
  4. Step 4: Simplify right side
    231,884.90x = 41,128,281,836.57
  5. Step 5: Solve for x
    x = 41,128,281,836.57/231,884.90
  6. Step 6: Final answer
    x = 177,365.07

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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.